Mental Health Billing 101: Common Mistakes and How to Fix Them

Mental health billing is among the most poorly understood areas of medical billing — and that misunderstanding costs behavioral health practices millions of dollars in preventable lost revenue every year. Whether you run a solo therapy practice, a psychiatric group, or a multi-discipline behavioral health center, the billing challenges are real: low reimbursement rates, aggressive prior authorization requirements, parity law enforcement gaps, and a minefield of bundling rules.

This guide covers everything you need to know: the correct CPT codes, the most common billing mistakes by error type, and concrete steps to fix them.

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The Mental Health Billing Landscape in 2026

Parity Law Context

The Mental Health Parity and Addiction Equity Act (MHPAEA) requires insurance plans to cover mental health services on terms no more restrictive than analogous medical/surgical services. This means:

• Coverage limits (session limits, day limits) for mental health cannot be more restrictive than for comparable medical services
• Prior authorization requirements for behavioral health cannot exceed those applied to comparable medical procedures
• Reimbursement rates for behavioral health must be equitable with medical/surgical rates

In practice, parity violations are common. If you are being denied for mental health after 20 sessions while comparable medical services have no visit limit, file a parity complaint with your state insurance commissioner.

The Telehealth Reality

Since COVID-19, audio-video telehealth for mental health has been widely adopted. CMS and most commercial payers now cover telehealth behavioral health services permanently. Key rules:

• POS 02 = Telehealth (patient not at home)
• POS 10 = Telehealth (patient at home — established 2022)
• Modifier 95 required by most commercial payers for synchronous audio-video telehealth
• Audio-only (telephone) telehealth: covered by some payers (including Medicare under certain circumstances) but narrowing in 2025–2026

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Core Mental Health & Behavioral Health CPT Codes

Psychiatric Evaluation Codes (90791–90792)

CPT Code	Description	Notes
90791	Psychiatric diagnostic evaluation (without medical services)	Used by therapists, psychologists, licensed counselors
90792	Psychiatric diagnostic evaluation with medical services	Psychiatrists and prescribing NPs/PAs only; can prescribe during this visit

Key distinction: 90792 is only billable when the provider can prescribe medications. Non-prescribing therapists and psychologists must use 90791. Using 90792 when the provider doesn't prescribe is fraud.

Psychotherapy Codes (90832–90838)

CPT Code	Time	Description
90832	16–37 minutes	Psychotherapy only
90834	38–52 minutes	Psychotherapy only
90837	53+ minutes	Psychotherapy only
90833	+16–37 min	Psychotherapy add-on (with E/M)
90836	+38–52 min	Psychotherapy add-on (with E/M)
90838	+53+ min	Psychotherapy add-on (with E/M)

The "add-on" distinction: Codes 90833, 90836, and 90838 are add-on codes used by psychiatrists when they both conduct an E/M visit (medication management) AND provide psychotherapy in the same session. They are billed WITH an E/M code — not alone.

Non-prescribing therapists bill only 90832, 90834, or 90837. They never bill psychiatry E/M codes or add-on therapy codes.

Psychiatry E/M Codes (99202–99215 with Modifier or 90833/90836/90838)

Psychiatrists billing for medication management visits use standard office E/M codes (99202–99215). Since 2021, psychiatric E/M visits are leveled the same as all other specialties — by MDM or time. When a psychiatrist adds psychotherapy to the medication management visit, they add the appropriate psychotherapy add-on code (90833, 90836, or 90838).

Example: Psychiatrist conducts a 45-minute visit: 20 minutes medication management + 25 minutes psychotherapy. Bill: 99214 (moderate complexity E/M) + 90833 (add-on psychotherapy, 16–37 min).

Group Psychotherapy (90853)

CPT Code	Description	Session Size
90853	Group psychotherapy	4–12 patients

Group therapy is billed per patient, per session. If you see 8 patients in a 90-minute group, each patient's claim bills CPT 90853. The rate is lower than individual therapy but the economics often work because of patient volume per hour.

Common mistake: Using 90853 for a two-person session. Most payers require a minimum of 3–4 patients to constitute a group. Two patientsmay only qualify as individual therapy.

Psychological and Neuropsychological Testing (96130–96146)

CPT Code	Description	Provider
96130	Psychological testing evaluation, first hour	Psychologist
96131	Psychological testing evaluation, each additional hour	Psychologist
96132	Neuropsychological testing evaluation, first hour	Neuropsychologist
96133	Neuropsychological testing evaluation, each additional hour	Neuropsychologist
96136	Psychological/neuropsych test administration, first 30 min	Psychologist or technician
96137	Test administration, each additional 30 min	Psychologist or technician
96146	Psychological test by automated computer, first 30 min	Must be validated instrument

Critical: The 2019 CPT testing code revision separated evaluation (96130–96133) from administration (96136–96137). Both can be billed when a psychologist evaluates AND administers testing. Billing 96130 alone when the psychologist both administered and interpreted the tests leaves money on the table.

Crisis and Other Codes

CPT Code	Description
90839	Psychotherapy for crisis, first 30–74 minutes
90840	Psychotherapy for crisis, each additional 30 minutes
90875	Individual psychophysiological therapy, 20–45 min
96156	Health behavior assessment, initial
96158	Health behavior intervention, individual, 30 min
96159	Health behavior intervention, each 15 min add-on

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The 10 Most Common Mental Health Billing Mistakes

Mistake #1: Using the Wrong Psychotherapy Time Code

The most frequent error in mental health billing is time mismatches — billing 90837 (53+ minutes) for a 50-minute session, or billing 90834 (38–52 minutes) for a 60-minute session.

Time thresholds are strict:

• 90832: minimum 16 minutes, maximum 37 minutes
• 90834: minimum 38 minutes, maximum 52 minutes
• 90837: minimum 53 minutes — no upper limit specified

A 50-minute session correctly bills as 90834, not 90837. Document the start and stop time in every clinical note.

Fix: Train providers to document session start/stop times. Use a timed note template. A 50-minute session = 90834. A 55-minute session = 90837.

Mistake #2: Billing 90792 for Non-Prescribers

Non-prescribing therapists, counselors, and psychologists cannot bill 90792. This is reserved for providers who provide medical services (i.e., can prescribe) during the same session. Billing 90792 when the provider is an LCSW or LPC is upcoding — a significant compliance risk.

Fix: Credential audit. Verify every provider's licensure level and map them to the correct code set in your billing system. LCSWs, LPCCs, MFTs = 90791 only for initial evaluations.

Mistake #3: Failing to Obtain Prior Authorization for Intensive Programs

Partial Hospitalization Programs (PHP) and Intensive Outpatient Programs (IOP) have among the highest prior authorization requirements in all of healthcare — denial rates of 15–20% for initial auth requests. Many practices begin IOP without obtaining authorization, assuming it will be retroactively approved. It often isn't.

Fix: Implement a mandatory pre-admission authorization checklist for PHP/IOP. No patient starts programming without an authorization number. Use an authorization tracking sheet with expiration dates.

Mistake #4: Billing Individual Therapy During Group Therapy Sessions

Billing 90837 (individual psychotherapy) for patients in a group session is fraud. Group therapy (90853) must be used whenever the therapist is providing psychotherapy to multiple patients simultaneously.

This distinction matters during "check-ins" at the end of group sessions — if the therapist spends time with a patient individually after group, that can be billed as individual if clearly documented as separate.

Mistake #5: Missing the Add-On Psychotherapy Code

Psychiatrists frequently conduct both medication management AND psychotherapy in the same visit but fail to capture the add-on therapy code (90833, 90836, or 90838). This is a significant revenue gap — the add-on codes add $20–$60 to the visit reimbursement depending on time and payer.

Fix: Add a checkbox to psychiatry note templates: "Psychotherapy provided: Y/N. If yes, minutes of psychotherapy." If yes, the coder adds the appropriate add-on code.

Mistake #6: Incorrect Use of Telehealth Modifiers

Commercial payers almost universally require modifier 95 for synchronous audio-video telehealth. Medicare uses POS 02 or POS 10 rather than modifier 95. Mixing up the rules:

• Billing Medicare with modifier 95 (instead of POS 10): triggers edits
• Billing commercial payers with POS 02 only (no 95): triggers denials
• Billing audio-only visits with telehealth codes when the payer requires a GT modifier: denials

Fix: Build a payer-level telehealth modifier crosswalk. Medicare: use POS 10 (or POS 02 when appropriate). Commercial: add modifier 95. Audio-only: verify coverage and modifier requirement per payer.

Mistake #7: Not Billing for Psychological Testing Components Separately

As noted, psychological testing now separates administration from evaluation. A psychologist who administers a 3-hour battery (MMPI-2, WAIS-IV, WMS-IV) and then spends 2 hours interpreting the results and writing the report bills:

• 96130 (first hour of evaluation)
• 96131 × 1 (second hour of evaluation)
• 96136 (first 30 minutes of administration)
• 96137 × 5 (five additional 30-minute blocks of administration = 2.5 hours)

Many practices only bill 96130 + 96131, missing thousands in testingrevenue.

Mistake #8: Ignoring Parity Law Violations

If a payer limits mental health therapy to 20 visits per year but covers unlimited physical therapy visits for a comparable musculoskeletal condition, they are violating MHPAEA. Practices often just accept these limits — but disputing them can unlock additional reimbursement.

Fix: Document parity violation patterns. When claims are denied after X visits, request in writing the payer's rationale and their equivalent limit for comparable medical/surgical services. Many payers will relent when pressed.

Mistake #9: Not Billing for SBIRT Services in Multi-Specialty Settings

Screening, Brief Intervention, and Referral to Treatment (SBIRT) codes (99408, 99409, H0049) are reimbursable by many payers for substance use screening in non-behavioral health settings. Practices with integrated behavioral health miss these billable screenings.

Mistake #10: Billing 90853 for a Two-Person Session

Group therapy requires a minimum of 3–4 patients (payer-specific, often 4). Billing two-patient sessions as group therapy is a coverage policy violation that triggers overpayment audit findings.

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Mental Health Documentation Requirements

Every psychotherapy note must include:

• Date and time of service (start and stop time)
• Patient name and unique identifier
• Type of service (individual/group/family)
• Diagnosis (ICD-10 and DSM-5 consistent)
• Clinical observations and patient's presentation
• Interventions used (specific therapeutic modalities)
• Patient response to treatment
• Progress toward treatment goals
• Plan for next session
• Provider signature and credentials

For E/M + psychotherapy: document both the medical section (medication review, side effects, prescribing decisions) and the psychotherapy section (modality, content, patient response) separately within the note.

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Key Revenue Maximization Strategies for Behavioral Health

1. Bill 90839/90840 for Crisis Intervention

Crisis psychotherapy codes pay significantly more than standard therapy codes. A 74-minute crisis intervention = 90839 (~$208 Medicare). Many practices underutilize these codes even when crisis intervention is clearly documented.

2. Implement Collaborative Care Billing (CoCM)

The Collaborative Care Model (CoCM) allows psychiatric consultants to bill monthly care management fees for patients managed by a primary care team using the BHCM framework:

• 99492: Initial month (~$316 Medicare)
• 99493: Subsequent months (~$254 Medicare)
• 99494: Add-on 30 minutes (~$90 Medicare)

This is a major untapped revenue stream for psychiatry groups with PCP partners.

3. Optimize Neuropsychological Testing Volume

Neuropsychological testing (96132–96133 + 96136–96137) generates some of the highest per-hour reimbursement in behavioral health. Add testing administration staff and optimize scheduling to run multiple evaluations per day.

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Frequently Asked Questions

Q: Can an LCSW bill for a psychiatric diagnostic evaluation? Yes, an LCSW can bill 90791 (psychiatric diagnostic evaluation without medical services). They cannot bill 90792 (which requires prescriptive authority).

Q: Can I bill both an E/M code and a psychotherapy code on the same day? Yes, but only for providers with prescribing authority (psychiatrists, prescribing NPs/PAs). Bill the E/M code (99202–99215) + the add-on therapy code (90833, 90836, or 90838). Non-prescribers bill only the standalone therapy codes (90832, 90834, 90837).

Q: Does Medicare cover telehealth mental health indefinitely? As of current legislation, Medicare has extended telehealth mental health coverage through 2026, with certain requirements (patient must have established an in-person relationship or live in a rural area, depending on the service type). Monitor CMS updates for extension beyond 2026.

Q: What is the reimbursement difference between 90837 and 90834? Medicare pays approximately $15–$20 more for 90837 vs. 90834. Commercial payers vary widely. The difference is real but modest — what matters more is accurate time coding, not upcoding a 50-minute session to 90837.

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Credentialing and Paneling for Behavioral Health Providers

For behavioral health practices, credentialing is often the most significant barrier to revenue — and one of the most mismanaged. A therapist who is not credentialed with a payer cannot bill that payer, regardless of how clinically excellent the care is.

Payer Credentialing Timelines by Provider Type

Credentialing timelines in behavioral health routinely exceed those in other specialties:

Provider Type	Average Credentialing Timeline	Notes
Psychiatrist (MD/DO)	90–150 days	Longest due to DEA/controlled substance verification
Psychologist (PhD/PsyD)	90–120 days	CAQH profile often required
LCSW	60–120 days	Medicare requires independent enrollment
LPC / LPCC	90–150 days	Many payers still don't credential LPCs independently
LMFT	60–120 days	Varies significantly by payer and state
NP (prescribing BH)	90–150 days	Both medical and DEA credentialing

Important: While a provider is pending credentialing, they generally cannot bill under their own NPI. Some practices use a "covering" credentialed provider arrangement — but this must be done carefully to avoid false claims issues.

Which Payers Credential LPCs and LMFTs?

This is one of the most frustrating realities of behavioral health credentialing: not all payers recognize all licensure types.

Medicare: Does NOT credential Licensed Professional Counselors (LPCs) or Licensed Marriage and Family Therapists (LMFTs). Medicare only recognizes:

• Physicians (MD/DO)
• Clinical psychologists (PhD/PsyD)
• Licensed clinical social workers (LCSWs)
• Certified nurse specialists (CNS)
• Nurse practitioners (NP)
• Physician assistants (PA)

LPCs and LMFTs who want to treat Medicare patients must bill under a credentialed supervisor or refer patients to credentialed providers.

Medicaid: Medicaid typically covers LPCs and LMFTs but requirements vary by state. Some states require independent credentialing; others allow billing under group practice NPI with appropriate supervision documentation.

Commercial payers: Most major commercial payers (UnitedHealthcare, Aetna, Anthem, Cigna) credential LPCs and LMFTs independently. However, some regional plans and employer-sponsored plans still exclude LPC billing.

Practical step: Before hiring a new therapist, confirm which payers they can be credentialed with. An LPC hire who can't bill Medicare or several state Medicaid programs has significantly limited revenue potential.

Group Practice Credentialing vs. Individual Credentialing

Behavioral health practices can credential under two models:

Individual (solo) credentialing:

• Each provider has their own NPI and is credentialed individually with each payer
• Claims are submitted under the individual provider's NPI
• Advantage: Provider can leave the group and take their credentials (and patients)
• Disadvantage: Each new hire requires a full new credentialing application per payer

Group credentialing:

• The group practice holds contracts with payers under the group NPI (Type 2 NPI)
• Individual providers are enrolled as rendering providers under the group
• Claims are submitted with both the group NPI (billing/pay-to) and the individual NPI (rendering provider)
• Advantage: Faster onboarding for new providers; easier payer management
• Disadvantage: Payer contracts belong to the group, not the individual

Most mid-size and larger behavioral health practices use group credentialing. The group holds the payer contracts, and individual providers are added as rendering providers — a much faster process (days to weeks vs. months).

Contracting With Commercial Payers: Rates and Negotiation

Insurance credentialing gets you in-network — but the rates you're contracted at matter enormously:

• Default contracted rates are almost never the best rates
• Payers negotiate differently based on your specialty mix, patient volume, geography, and market competition
• Behavioral health reimbursement is historically lower than comparable medical services — parity law notwithstanding
• A practice with 5+ providers, strong patient volumes, and outcomes data has more negotiating leverage than a solo practitioner

Negotiation targets for behavioral health:

• 90837 (60-minute psychotherapy): Target $120–$180+ for commercial payers (Medicare pays ~$115)
• 90791 (intake/evaluation): Target $175–$250 for commercial payers
• 90792 (psychiatric diagnostic with medication): Target $225–$300 for commercial payers
• 99214 (psychiatry E/M, moderate complexity): Same as any specialty — target at or above Medicare rate

When to negotiate: At initial credentialing (before signing), at contract anniversary (typically annually), and when your practice metrics improve significantly (high retention, outcome data, low complaint rates).

Joining Insurance Panels vs. Staying Out-of-Network

Not every practice should join every insurance panel. The calculation:

In-network advantages:

• Larger patient volume (patients prefer in-network providers)
• Guaranteed reimbursement per contracted rate
• No billing friction for patients with good coverage

In-network disadvantages:

• Rates may be below your cost per session
• Administrative burden (prior auths, appeals, utilization review)
• Potential for payer audits and clawbacks

Out-of-network model:

• Charge your full fee ($200–$350+ per session depending on market)
• Patient pays out-of-pocket and submits for reimbursement to their insurer (using a superbill you provide)
• Patient receives partial reimbursement (typically 60–80% of "reasonable and customary" rate after deductible)
• Lower administrative overhead; no payer contracts; no auth requirements

Hybrid approach: Many behavioral health practices are in-network with 2–3 major payers (UHC, Aetna, BCBS) and out-of-network for everything else. This captures volume from the largest commercial payers while preserving fee flexibility for smaller plans.

The Superbill and OON Reimbursement Model

For out-of-network patients, the superbill is the core billing document:

A superbill must include:

• Provider name, NPI, tax ID, and practice address
• Patient name, date of birth, and insurance ID
• Date of service
• CPT code(s) and ICD-10 diagnosis code(s)
• Fee charged per service
• Provider signature and credentials

Patients submit the superbill to their insurer directly. The insurer reimburses the patient (not the practice). The practice collects the full fee from the patient at time of service.

OON reimbursement rates: Most plans reimburse 60–80% of "UCR" (usual, customary, and reasonable) rates after the out-of-network deductible is met. Educate patients on their OON benefit before the first session.

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Partial Hospitalization Program (PHP) and Intensive Outpatient Program (IOP) Billing

PHP and IOP are among the highest-revenue behavioral health programs — and among the most heavily scrutinized by payers. Getting the billing right from day one is critical.

PHP Billing Codes and Structure

Partial Hospitalization Programs provide structured psychiatric services typically 5–6 hours/day, 5 days/week. Billing models vary by payer:

Per-diem billing (most common for Medicare and commercial payers):

Code	Description	Medicare Rate (est.)
S0201	Partial hospitalization, per diem	Varies ($300–$700/day commercial)
APC 0173/0174	Ambulatory Payment Classification (hospital-based PHP)	Hospital OPPS rates

Service-based billing (used by some Medicaid programs and commercial payers):

Code	Description
90853	Group psychotherapy
90837	Individual psychotherapy
90791	Psychiatric diagnostic evaluation
99213–99214	Medication management E/M
H0015	Alcohol and drug treatment, intensive outpatient
H0035	Mental health PHP, per diem
H2014	Skills training, per 15 minutes

Medicare billing: Hospital-based PHP is billed through the outpatient hospital claims system (UB-04) using APC rates. Non-hospital-based PHP is billed differently — verify whether your PHP is certified as a Medicare psychiatric day treatment program.

IOP Billing Codes and Structure

Intensive Outpatient Programs provide 3 hours/day, 3 days/week minimum (9 hours/week). Billing:

Code	Description	Coverage
H0015	Alcohol/drug treatment, intensive outpatient	Medicaid, some commercial
S9480	Intensive outpatient psychiatric services, per diem	Commercial payers
90853	Group psychotherapy	Universal (where IOP is service-billed)
90837	Individual psychotherapy (when provided)	Universal
90791	Intake/diagnostic evaluation	Universal
99214	Medication management (psychiatrist or NP)	Universal

Per-diem vs. fee-for-service: Per-diem billing bundles all services in a day's programming into a single daily rate. Fee-for-service bills each service individually. Fee-for-service often generates higher total revenue but requires more detailed documentation per service.

Prior Authorization for PHP and IOP

PHP and IOP have the highest prior authorization burden in behavioral health:

• Initial authorization denial rates: 15–20% for first requests
• Most payers require clinical review before authorizing even the first day of PHP/IOP
• Concurrent review occurs every 3–7 days during the program — the payer can terminate authorization mid-program
• At PHP step-down to IOP: a new authorization is typically required

Reducing denial rates:

1. Submit clinical documentation that explicitly meets the payer's medical necessity criteria (not just your clinical judgment)
2. Use the payer's language — many publish specific criteria for PHP vs. IOP medical necessity
3. Include the GAF/WHODAS score, risk assessment, and prior treatment history in every auth request
4. Assign a dedicated utilization review (UR) staff member to manage concurrent reviews

When authorization is denied: Immediately file a peer-to-peer review request. A psychiatrist speaking directly to the payer's medical reviewer overturns approximately 40–60% of initial PHP/IOP denials in peer-to-peer conversations.

Step-Down Documentation Requirements

The clinical documentation for PHP → IOP → outpatient step-down must demonstrate clear justification for the level of care change:

PHP admission justification must include:

• Active suicidal or homicidal ideation with plan or intent (or recent such ideation)
• Inability to maintain safety in a lower level of care
• Acute psychiatric symptom exacerbation requiring daily monitoring
• Recent inpatient hospitalization requiring a structured step-down

Step-down from PHP to IOP justification must include:

• Stabilization of acute safety concerns
• Engagement with treatment and ability to benefit from group format
• Functional improvement sufficient to manage 3 hours/day rather than 5–6 hours/day
• Support system able to manage patient during non-programming hours

Step-down from IOP to outpatient:

• Symptom remission or stable chronic management
• Ability to manage 1–2 sessions/week with appropriate support
• No acute safety concerns in the prior week of programming

Document level-of-care decisions using a validated tool (ASAM Criteria for substance use, InterQual or Milliman for psychiatric care). Payers expect to see these tools referenced in the clinical record.

Utilization Review and Concurrent Review Process

Concurrent review is the payer's mechanism to authorize continued PHP/IOP treatment:

1. Initial review: Submit clinical documentation before day 1 of programming
2. First concurrent review: Typically on day 3–5 of PHP; day 7–10 of IOP
3. Ongoing reviews: Every 3–7 days for PHP; weekly for IOP
4. Discharge review: Payers may require notification of planned discharge and step-down plan

What payers look for in concurrent review:

• Evidence of symptom change (improving or stable with justification for continued care)
• Patient engagement and attendance (absences without justification are red flags)
• Updated safety assessment
• Progress toward measurable treatment goals

Maintain a utilization review tracker: authorization dates, authorization numbers, next review dates, and assigned UR contact at each payer. Missing a review window by even one business day can result in retroactive denial of days already provided.

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Medicaid Behavioral Health Carve-Outs

Medicaid behavioral health is particularly complex because many states "carve out" behavioral health benefits from their regular Medicaid managed care organizations, contracting with separate behavioral health managed care organizations (BH MCOs).

What Is a Behavioral Health Carve-Out?

In a behavioral health carve-out:

• The state Medicaid agency contracts with a separate managed care organization specifically for behavioral health services
• Medical/physical health services remain with the regular Medicaid MCO (or fee-for-service Medicaid)
• The patient has SEPARATE plans: one for medical care, one for mental health and substance use

Why this matters for billing:

• You cannot bill the regular Medicaid MCO for behavioral health services — they will deny the claim
• You must identify and credential with the BH-specific MCO for each patient
• A patient's Medicaid card may show only the medical MCO — the BH MCO requires separate lookup

Identifying the Correct BH MCO

To identify the behavioral health MCO for a Medicaid patient:

1. Call the Medicaid Member Services line on the patient's card and ask specifically: "Is behavioral health carved out? If so, who is the behavioral health plan?"
2. Use your state's Medicaid provider portal — most states have a provider lookup tool that identifies both medical and BH plan assignments
3. Ask the patient directly — they should have received a separate ID card for behavioral health
4. Contact your state's behavioral health authority directly if unclear

State-by-State Carve-Out Examples

State	BH Carve-Out Entity	Notes
New Jersey	NJ Division of Mental Health and Addiction Services (DMHAS) via contracted MCOs	NJ FamilyCare carves out BH for some populations
Texas	STAR+PLUS MCOs (Molina, UHC Community Plan, etc.) manage BH for some populations; STAR Kids separate	Complex multi-plan structure
California	County Mental Health Plans (for specialty MH services); Medi-Cal managed care covers mild-moderate BH	Two-tier system by severity
New York	OMH-licensed clinics bill Medicaid managed care directly; HARP program for high-need BH	HARP has separate authorization requirements
Pennsylvania	HealthChoices BH MCOs (Beacon Health Options, Optum, etc.)	Each county has a designated BH MCO
Massachusetts	MassHealth BH carve-out managed by MBHP (Beacon) for some populations	Integrated plans expanding

Separate Credentialing for BH MCOs

Each BH MCO requires its own credentialing — being credentialed with a state's regular Medicaid MCO does NOT automatically credential you with the BH MCO.

Credentialing checklist for Medicaid BH carve-outs:

• Identify all BH MCOs operating in your service area
• Submit separate credentialing applications to each BH MCO
• Maintain separate provider IDs for each BH MCO
• Track separate authorization procedures for each BH MCO
• Monitor each BH MCO's claims submission requirements separately (some use paper; some require specific EDI formats)

Why BH Carve-Out Denials Differ

BH carve-out denials are fundamentally different from medical Medicaid denials:

• Wrong payer denials: Submitted to the medical MCO when services are carved out. Fix: identify and re-submit to correct BH MCO.
• Non-covered provider denials: LPCs or LMFTs not recognized by the specific BH MCO. Fix: verify provider type coverage before scheduling.
• Out-of-authorization denials: BH MCOs often have tighter session limits and require pre-authorization for ongoing therapy. Medical Medicaid may not require auth for similar services. Fix: check BH MCO authorization requirements independently.
• Credentialing denials: Provider credentialed with the medical MCO but not the BH MCO. Fix: credential with the BH MCO.

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Value-Based Care in Behavioral Health

Value-based care (VBC) is reshaping reimbursement across specialties — and behavioral health is no exception. Understanding VBC programs lets behavioral health practices access higher reimbursement tied to outcomes.

MIPS Participation for Behavioral Health Providers

Behavioral health providers who are MIPS-eligible (psychiatrists, psychologists billing E/M codes) can earn MIPS payment adjustments of +/- 9% of Medicare reimbursement:

MIPS quality measures relevant to behavioral health:

• Depression Remission at 12 Months (NQF 0710): PHQ-9 score <5 at 12-month follow-up
• Depression Utilization of the PHQ-9 Tool (NQF 0712): PHQ-9 administered at all depression visits
• Preventive Care: Screening for Depression (NQF 0418): Applicable to primary care with BH integration
• Tobacco Use: Cessation Intervention (NQF 0028): Applicable when substance use comorbidities present
• Unhealthy Alcohol Use (NQF 3573): Screening and brief intervention

PHQ-9 as a quality infrastructure investment: The PHQ-9 patient health questionnaire is the foundation for behavioral health MIPS quality measures. Implementing systematic PHQ-9 administration at every depression visit (using a validated electronic tool) creates the quality data for MIPS reporting AND improves clinical care.

Collaborative Care Model (CoCM) Revenue

The Collaborative Care Model (CoCM) is one of the most financially compelling value-based behavioral health programs:

How CoCM works:

• A primary care practice partners with a psychiatric consultant (psychiatrist or psychiatric NP)
• A care manager (often an LCSW or nurse) coordinates behavioral health care within the primary care setting
• The primary care provider bills monthly care management codes based on care manager and psychiatric consultant time

CoCM billing codes:

Code	Description	Medicare Rate (est.)	Required Time
99492	Initial month of CoCM	~$316/month	70 min total care manager + psych consult time
99493	Subsequent months	~$254/month	60 min total care manager + psych consult time
99494	Add-on 30 minutes	~$90/month	+30 min

Revenue example: A primary care practice with 50 patients enrolled in CoCM billing 99493 monthly generates approximately $12,700/month in CoCM revenue — $152,400/year — for care that is mostly provided by care managers and a part-time consulting psychiatrist.

The psychiatric consultant does not need to be present at the primary care site. Consultation is conducted asynchronously (chart review, care manager discussions) or via scheduled brief case conferences.

Primary Care Behavioral Health (PCBH) Integration Billing

PCBH embeds behavioral health providers directly into primary care workflows. Billing for integrated behavioral health:

Code	Description	Notes
96156	Health behavior assessment, initial	For BH factors affecting physical health conditions
96158	Health behavior intervention, individual, 30 min	Anxiety management, smoking cessation, chronic pain coping
96159	Health behavior intervention, each additional 15 min	Add-on to 96158
96164	Health behavior intervention, group, 30 min	Health behavior groups in primary care
99408	Alcohol/substance abuse screening and brief intervention, 15–30 min	SBIRT
99409	SBIRT, 30+ min	Higher-complexity substance use screening

Key distinction: Health behavior codes (96156–96164) are for patients with primary medical conditions (diabetes, heart disease, chronic pain) where behavioral health factors affect medical outcomes. They are NOT for psychiatric diagnoses. A diabetic patient with diabetes distress is billed under 96158; a patient with major depression is billed under 90837.

Population Health Management for Behavioral Health Panels

Practices moving into value-based contracts need population health management capabilities:

• Registry tracking: Maintain a depression registry using PHQ-9 scores over time. Identify patients who haven't been seen in 90+ days (high fall-off-care risk).
• Outcome measurement: Track remission rates (PHQ-9 <5), functional status (WHODAS 2.0), and treatment engagement (no-show rates).
• Panel management: Allocate provider time by patient acuity — high-acuity patients seen more frequently; stable patients seen via check-in visits or telehealth.
• Quality reporting tools: EHRs with MIPS quality reporting integration (SimplePractice, Luminare, Kipu Health, Valant) automate PHQ-9 tracking and quality measure calculation.

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Employee Assistance Program (EAP) Billing

Employee Assistance Programs are a significant referral source for behavioral health practices — but EAP billing has its own rules that practitioners often misunderstand.

What EAP Sessions Are and How They Work

An EAP is an employer-sponsored benefit that provides employees (and often their family members) access to short-term counseling services at no cost to the employee. Key features:

• Typically 3–8 free sessions per issue per year (varies by employer)
• Funded by the employer — the EAP vendor pays the provider directly
• Sessions are NOT billed to the employee's health insurance — they are billed to the EAP vendor
• EAP sessions are completely separate from the patient's insurance benefits
• EAP referrals are often for short-term, issue-focused concerns (workplace stress, relationship issues, grief)

Billing EAP Sessions vs. Transitioning to Insurance

During EAP sessions:

• Bill the EAP vendor (not the patient's insurer) using the specific billing process the EAP vendor requires
• Most EAPs pay a flat per-session rate ($65–$120 per session, depending on the EAP vendor and your contract)
• EAP vendors typically use their own billing portal or specific paper claims — they do NOT use standard health insurance claims submission

After EAP sessions exhaust:

• Once the authorized EAP sessions are used, the patient transitions to their regular health insurance (if applicable) or self-pay
• You must bill the patient's health insurer starting with the first post-EAP session
• Obtain insurance information and verify eligibility BEFORE the EAP sessions exhaust — do not wait for the patient to tell you their sessions are done

Transition planning: Build a session countdown into your EAP intake process. If a patient is authorized for 6 EAP sessions, at session 4, have an administrative conversation about continuing care options post-EAP.

CPT Codes for EAP Sessions

EAP sessions use the same CPT codes as regular therapy:

Service	CPT Code
Initial evaluation/intake	90791
60-minute individual therapy	90837
45-minute individual therapy	90834
30-minute individual therapy	90832
Couple/family therapy without patient present	90846
Couple/family therapy with patient present	90847
Group therapy	90853

The EAP vendor's billing process varies: some require standard CPT billing through an EDI submission; others use proprietary portals; some (smaller EAPs) use simple invoicing with CPT codes and a provider NPI.

EAP Documentation Requirements

EAP documentation differs from regular clinical documentation in important ways:

• Confidentiality limitations: EAP records are typically NOT shared with the employer — but your EAP contract may define what utilization data is shared with the employer
• Scope of service: EAP sessions are for short-term, issue-focused work. Document that treatment is within EAP scope; extensive long-term treatment planning language can create problems with EAP authorization
• Clinical necessity: Some EAPs require documentation supporting continuation beyond the standard session limit — similar to a mini-prior authorization for extra sessions
• Separate record systems: Many practices maintain EAP records separately from standard clinical records to protect confidentiality per EAP contract terms

Common EAP Billing Mistakes

Mistake 1: Billing insurance for EAP sessions EAP sessions must be billed to the EAP vendor, not the patient's insurer. Billing a session to insurance that was provided under EAP is double-billing — a serious compliance issue.

Mistake 2: Billing EAP after sessions have exhausted Track authorization carefully. If the EAP authorizes 6 sessions and you bill a 7th session to the EAP without a new authorization, that claim will be denied and may trigger an audit of prior sessions.

Mistake 3: Not collecting insurance information during EAP treatment Patients often arrive via EAP without their insurance card, assuming they won't need it. Collect insurance information at intake — even if not needed during EAP — so you're ready to bill at session 7.

Mistake 4: Assuming EAP rates equal insurance rates EAP contracts often pay $65–$85 per session — significantly below typical commercial insurance rates of $120–$180+ per session. Understand your EAP contract economics. High EAP volume at low rates can create revenue problems.

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Frequently Asked Questions (Continued)

Q: Can I bill insurance for a therapy session if the patient also used their EAP sessions? Yes — once EAP sessions are exhausted, you bill the patient's health insurance for subsequent sessions using standard CPT codes. The EAP sessions and insurance sessions are completely separate billing channels. However, you cannot bill insurance for a session that was covered under EAP — that would be double-billing. Also note: EAP and insurance deductibles are independent. A patient may still have a high insurance deductible even though they received EAP sessions for free.

Q: How do I handle a patient who owes a copay but says they can't afford it? Routine waiving of copays is a compliance risk — it is considered providing a financial benefit not reflected in the contracted rate, which can violate anti-kickback and insurance fraud statutes. However, you can implement a formal financial hardship policy: document the patient's financial situation, apply a hardship waiver consistently using documented criteria, and apply it consistently (not selectively). Do not simply waive copays informally on a case-by-case basis without documentation. If a patient cannot consistently afford their copay, discuss whether an out-of-network or sliding-scale arrangement might be more appropriate than continuing to waive in-network copays.

Q: What is the difference between billing 90837 and 99215 for a psychiatrist? 90837 is a standalone psychotherapy code — it represents 53+ minutes of psychotherapy only. 99215 is the highest-level office E/M code — it represents a high-complexity evaluation and management visit for medication management. A psychiatrist who only manages medications (no formal psychotherapy) bills 99215. A psychiatrist who conducts medication management AND psychotherapy in the same visit bills 99215 (or 99214) PLUS the add-on psychotherapy code (90833, 90836, or 90838, depending on psychotherapy time). 90837 alone is used when the psychiatrist provides psychotherapy only — no medication management. In practice, most psychiatry visits involve medication management and bill as E/M codes, with add-on therapy codes added when therapy is also provided.

Q: How do I maximize reimbursement in a group practice with multiple therapists? Several strategies compound in a group setting: (1) Credential all therapists optimally — ensure every therapist is paneled with the highest-paying payers possible for their licensure type; (2) Implement consistent time documentation so every 90837 that should be billed IS billed (the single biggest revenue leak in group practices is billing 90834 for sessions that meet 90837 time); (3) Ensure psychiatrists in the group capture add-on therapy codes (90833/90836/90838) whenever psychotherapy is provided alongside medication management; (4) Implement CoCM partnerships if the group includes psychiatrists — billing 99493 for 50+ patients adds $12,000+/month in care management revenue; (5) Audit your fee schedule annually and negotiate with commercial payers — group practices have leverage that solo practitioners don't.

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Start Capturing Your Full Mental Health Revenue

Mental health billing is uniquely challenging, but the financial stakes are too high to leave revenue on the table through billing errors. Contact Healix RCM for a free mental health revenue cycle assessment — we'll identify coding gaps and denial patterns specific to your practice within 30 days.