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Mental Health Billing Services (MHBS) operates credentialing practices built around one discipline. Behavioral health. Enrollment closes in 60 to 90 days. Parallel application submission trims 4 to 8 weeks off the sequential timeline..
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Behavioral health coding turns on time-banded CPT codes, ICD-10-CM specificity, state-specific Medicaid modifiers, and MBHO routing rules. None of these show up in standard medical billing. Generic coders default to E/M habits. They miss psychotherapy time sensitivity and skip state modifier sets.
Standard medical billing rewards procedures. Mental health billing rewards documented minutes. The 90834 code requires 38 to 52 minutes of face-to-face therapy. The 90837 code needs 53 minutes or more. Generic coders default to standard E/M patterns.
Behavioral health diagnoses need precise ICD-10-CM codes. The code F32.1 (moderate depression) tells a payer something different than F32.9 (unspecified depression). Generic coders default to unspecified codes. That choice triggers payer downcoding and raises audit risk.
State Medicaid programs use modifiers like HF, HO, HN, and U1 through U9. These signal provider credential level and service type. Generic coders skip them. They accept partial payment as normal. We apply the correct modifier set per state per claim.
Built for behavioral health practices. Not for generic medical billers handling psychotherapy claims on the side.
| CPT Code | Documented Time Required |
|---|---|
|
90832 |
16 to 37 minutes |
|
90834 |
38 to 52 minutes |
|
90837 |
53 minutes or more |
Vague time language like “approximately one hour” fails payer audits. Specific start and stop times protect 90837. We flag systematic under-documentation patterns before they become a problem.
| CPT Code | Service |
|---|---|
|
90791 |
Psychiatric diagnostic evaluation, no medical services |
|
90792 |
Psychiatric diagnostic plus medical services (MD/DO/PMHNP only) |
|
90839 |
Crisis psychotherapy, first 30 to 74 minutes |
|
90840 |
Crisis psychotherapy add-on, each additional 30 minutes |
The 90791 code bills once per episode of care. It does not repeat at every re-evaluation. Treatment plan updates code as E/M (99214) instead. Add-Ons, E/M, and Group Codes
| CPT Code | Use Case |
|---|---|
|
90785 |
Interactive complexity (pediatric, ASD, communication barriers) |
|
90833 / 90836 / 90838 |
Psychotherapy 30/45/60 min add-on to E/M |
|
99213 / 99214 / 99215 |
E/M established patient (psychiatry, PMHNP) |
|
90846 / 90847 |
Family therapy (without patient / with patient) |
|
90853 |
Group psychotherapy (billed per patient) |
Psychiatrists and PMHNPs often under-bill. They skip the psychotherapy add-on. When documentation supports medication management and psychotherapy in the same visit, both should code. Modifier 25 goes on the E/M.
Beyond these, our coders manage psychological testing codes 96130 to 96139. We handle ABA codes 97151 to 97158. We code HCPCS H-codes for state Medicaid behavioral health. We bill TMS codes 90867 to 90869 for refractory depression treatment.
Transitioning to a new billing company often disrupts cash flow. We follow a strict 30-day onboarding schedule to prevent payment gaps.
1:- Major Depressive Disorder needs an episode type (single F32 or recurrent F33) and a severity (mild, moderate, severe, with or without psychotic features). F32.1 captures a moderate single episode. F32.9 leaves money on the table.
1:- GAD codes as F41.1. Panic disorder is F41.0. PTSD splits across F43.10 (unspecified), F43.11 (acute), and F43.12 (chronic). Adjustment disorders use F43.2x with a specifier. We code chronicity straight from the documentation.
1:- The F10 to F19 series needs three pieces. The substance. The use pattern (use, abuse, dependence). The clinical state (intoxication, withdrawal, remission). Generic coders default to F19.10. We code the specific substance and the current state from the note.
Behavioral health practices need different coding depth depending on the services they bill. Each type below has its own complexity.
Individual psychotherapy codes by time band (90832, 90834, 90837). Group psychotherapy (90853) bills per patient. Family therapy uses 90846 without patients or 90847 with patients. Time-band accuracy is the single biggest revenue protector.
A documented 55-minute individual session codes 90837. “Approximately one hour” codes 90834 conservatively.
Initial psychiatric diagnostic evaluations code 90791 for non-prescribers. They code 90792 for psychiatrists and PMHNPs delivering medical services. Re-evaluations and routine treatment plan updates code as E/M, not a repeat 90791.
A new patient intake codes 90791. Six months later, a medication review codes 99214.
E/M codes (99213 to 99215 established, 99202 to 99205 new) combine with a psychotherapy add-on (90833, 90836, or 90838) when documentation supports both services. Modifier 25 attaches to the E/M.
A 30-minute psychiatry visit with med review plus 20 minutes of psychotherapy codes 99214 plus 90833 with modifier 25.
Testing evaluation uses 96130 for the first hour and 96131 for each additional hour. Administration codes split between professional (96136, 96137) and technician (96138, 96139). Brief screeners like PHQ-9 and GAD-7 code 96127 per instrument. MUE caps daily units.
A 4-hour neuropsychological evaluation codes 96130 plus 96131 times 3 units.
Assessment uses 97151 and 97152. Protocol treatment codes 97153 (individual) or 97154 (group). Protocol modification uses 97155 and 97158. Family guidance codes 97156 and 97157. Every unit is 15 minutes.
A 3-hour RBT direct treatment session codes 97153 times 12 units. BCBA supervision tracks separately.
A 3-hour RBT direct treatment session codes 97153 times 12 units. BCBA supervision tracks separately.
Place of service drives the claim. POS 02 covers patient not in the home. POS 10 covers patients at home. Modifier 95 attaches to synchronous video. Modifier FQ covers audio-only Medicare. Modifier 93 covers audio-only commercials.
A video psychotherapy session with the patient at home codes 90834 plus POS 10 plus modifier 95.
Most billing companies do not publish coding benchmarks. We do.
Revenue lift from correct coding
Coding accuracy rate
First-pass clean claim rate
Coding turnaround
ICD-10 specificity (avoid “unspecified”)
NCCI compliance
Coder certification rate
Industry averages come from MGMA and HFMA benchmarking data. Behavioral health performs worse than averages when handled by generic medical coders. The losses come from under-coded 90837, missed psychotherapy add-on codes, and unspecified ICD-10 defaults.
Step 1
We read the clinical note before assigning codes. For psychotherapy codes, we verify documented start and stop times against the CPT time band. For E/M codes, we verify Medical Decision Making supports the level.
Every claim passes through five steps before submission. Here is the process.
Step 2
We map documented clinical diagnoses to specific ICD-10-CM codes at the highest supported specificity. Severity, episode type, and chronicity code from the note. We avoid “unspecified” codes unless the record supports.
Step 3
We apply modifiers by payer, state, and service type. Telehealth gets 95 or FQ depending on the payer. Same-day E/M with procedure gets 25. State Medicaid programs get HF, HO, HE, HN, or U-series modifiers as required. No generic defaults.
Step 4
Every claim runs against NCCI bundling edits and MUE unit limits before submission. NCCI flags inappropriate code combinations. MUE catches unit overages. Both trigger automatic denial when missed.
Step 5
We document why each code was applied. Which clinical note element supports the CPT. What diagnosis documentation justified the ICD-10 selection. What payer rule drove the modifier. If a payer audit lands later, we supply the supporting documentation trail.
You suspect your current biller is coding wrong. The audit checks. We review 50 to 100 of your recent claims across your full CPT mix. We compare every code to the underlying documentation. We flag every issue we find. You receive specific findings and a revenue recovery estimate within 48 hours. No obligation. The report is yours to keep either way. What the Audit Covers
“Working with this billing team has completely changed the way we manage our practice revenue. Their attention to detail, fast claim submissions, and follow-up on denied claims helped us improve reimbursements within the first few months. I finally have peace of mind knowing our billing is handled professionally.”
Mental health credentialing takes 60 to 120 days, depending on payer and provider type. Medicare PECOS averages 45 to 65 days. Aetna, Cigna/Evernorth, and UnitedHealthcare/Optum average 60 to 90 days. Anthem/Carelon and most BCBS plans average 90 to 120 days.
Credentialing verifies provider qualifications against payer standards. Contracting establishes the payment relationship plus the fee schedule. A cleared credentialing file cannot bill until the contract is executed.
CAQH ProView is required by 90% of commercial behavioral health payers. Re-attestation runs every 120 days. Lapsed profiles trigger silent panel suspension across multiple payers at once.
Yes. PMHNPs bill medication management E/M codes through medical panels plus psychotherapy through behavioral health carve-outs. Single-panel enrollment strands 30%+ of billable revenue.
The 2024 Medicare expansion added LMFTs and LMHCs as billable providers at 75% of the Medicare Physician Fee Schedule. Enrollment runs through PECOS using CMS-855I.
You do not know if your coding is right. Your biller says it is. Your denial rate suggests otherwise. The audit settles the question. We sample 50 to 100 of your recent claims. We deliver specific findings within 48 hours.
Response within 1 business day. HIPAA-compliant intake. Sample claims handled securely.
Simplifying mental health billing with accurate claims, faster reimbursements, and seamless revenue cycle management.
info@mentalhealthbillingservice.com
(860) 500-1471
403, Port Washington Road
