Behavioral health billing is a distinct specialty inside the broader mental health billing category — and the distinctions matter for billing. A therapist in private practice billing CPT 90837 and a substance use disorder treatment center billing H0015 for intensive outpatient services face completely different payer environments, compliance requirements, and denial patterns.
This page covers billing for behavioral health organizations operating across the full continuum of care: outpatient counseling, intensive outpatient programs (IOP), partial hospitalization programs (PHP), and residential services.
The Three Billing Problems That Hit Behavioral Health Organizations Hardest
1. 42 CFR Part 2 — Substance Use Disorder Confidentiality Compliance
42 CFR Part 2 is a federal confidentiality regulation specific to substance use disorder treatment records that is more restrictive than standard HIPAA. It prohibits disclosure of SUD treatment information without specific written consent — including disclosure to other treating providers, insurers processing claims, and government agencies. For behavioral health billing, this creates specific requirements around what information can be included on claims and what must be excluded from routine billing communications.
Billing staff who don’t understand 42 CFR Part 2 create compliance exposure by including SUD diagnostic information in claim submissions or insurance communications without appropriate consent documentation. A biller specializing in behavioral health understands these boundaries before the first claim goes out.
2. Carve-Out Payer Routing and ASAM Level of Care Authorization
Most commercial payers carve out behavioral health benefits to managed behavioral health organizations — Magellan, Optum Behavioral, Beacon Health Options, Value Options. Claims submitted to the primary commercial insurer for behavioral health services are denied CO-109 and must be routed to the carve-out entity.
Beyond routing, behavioral health carve-outs use the ASAM (American Society of Addiction Medicine) criteria to authorize level of care — outpatient, IOP, PHP, residential. Authorization for one level doesn’t automatically extend to another. A patient admitted to IOP who steps up to PHP requires a new authorization at the PHP level. Missing that step generates a denial for every PHP session billed without authorization.
3. H-Code and Revenue Code Billing for IOP and PHP
Behavioral health programs that operate at the IOP or PHP level bill using a combination of HCPCS H-codes (H0015 for IOP, H2019 for PHP) and procedure codes for the specific services delivered within each session — group therapy, individual therapy, psychiatric evaluation. Revenue codes are required for facility billing. The interaction between HCPCS codes, CPT codes, and revenue codes on facility claims requires specific training that general billers don’t have.
A behavioral health organization running both outpatient and IOP services came to us after their IOP claims were systematically denying. Their biller had been submitting IOP claims using the same workflow as outpatient — CPT therapy codes only, no H-codes, no revenue codes.
Every IOP claim was denying because the payer required H0015 with the corresponding CPT codes and revenue code 0905 for the facility component. The biller had never been trained on IOP billing and didn’t know what she didn’t know.
We rebuilt the IOP billing workflow from scratch. Claims were corrected and resubmitted with the proper code combination. The organization recovered $67,000 in previously denied IOP claims within the timely filing window. Prospectively, the IOP clean claim rate moved to 94% within the first billing cycle.
Behavioral Health Billing Codes Reference
| Code | Description | Used For |
|---|---|---|
| H0015 | Alcohol and/or drug services; intensive outpatient | IOP programs — typically billed per diem or per session |
| H2019 | Therapeutic behavioral services, per diem | PHP programs — per diem billing with revenue codes |
| H0004 | Behavioral health counseling and therapy, per 15 minutes | Individual SUD counseling — time-based billing |
| 90837 | Psychotherapy, 53+ minutes | Individual therapy in outpatient behavioral health |
| 90853 | Group psychotherapy | Group therapy sessions in IOP/PHP |
| 99213-99215 | E/M outpatient established patient | Psychiatric medication management visits |
| 90792 | Psychiatric diagnostic evaluation with medical services | Initial psychiatric evaluation with prescribing component |
CARF-Accredited Programs — What Billing Must Reflect
Behavioral health programs accredited by CARF (Commission on Accreditation of Rehabilitation Facilities) have documentation requirements that must be reflected in billing. Treatment plans must be current. Level of care must match authorization. Progress notes must support continued medical necessity at the authorized level. A CARF audit that finds billing inconsistencies — claims billed at a higher level than documentation supports — creates both accreditation and compliance risk.
Billers specializing in behavioral health know how CARF documentation requirements intersect with payer billing requirements. General billers don’t.
Frequently Asked Questions
What is the difference between mental health billing and behavioral health billing?
Mental health billing typically refers to outpatient therapy — CPT 90832–90837, carve-out routing, prior auth per session block. Behavioral health billing covers the full continuum including substance use disorder treatment, which adds 42 CFR Part 2 compliance, ASAM level of care authorization, H-codes and revenue codes for IOP/PHP, and CARF documentation requirements.
Do you handle billing for substance use disorder treatment programs?
Yes. Our behavioral health billing specialists are trained in 42 CFR Part 2 compliance, ASAM level of care authorization, IOP/PHP H-code and revenue code billing, and carve-out payer routing. Every biller assigned to a behavioral health account understands the compliance requirements specific to SUD treatment before the first claim is submitted.
What EHR systems do your behavioral health billers support?
Kipu Health, Procentive, TheraNest, AdvancedMD, Kareo/Tebra, SimplePractice, and Netsmart CareVue — the platforms most common in behavioral health and substance use disorder settings.
Behavioral health billing fails when general billers apply outpatient therapy workflows to IOP/PHP claims. The right specialist knows the difference. Book a free 15-minute call — or start the 4-week free pilot.
Related Specialty Billing Services
See our guides for Mental Health Billing Services — outpatient therapy, carve-out payer routing, and time-based CPT codes — and Psychiatry Billing Services for programs that integrate psychiatric medication management with behavioral health treatment.