Substance use disorder billing is fragmented across HCPCS, CPT, and state-specific codes at once, and parity violations by insurers are routine — if you're not actively tracking denial rates by payer, you're almost certainly leaving revenue uncollected.
Common Billing Challenges
These are the six billing failure points we see most often in substance use disorder treatment providers — and the ones our team resolves systematically from day one.
Office-based buprenorphine prescribing bills as standard E/M (99212-99215); licensed Opioid Treatment Programs bill Medicare through a bundled weekly HCPCS payment (G2067-G2080) — mixing up the two models is a routine error.
Medicaid OTP billing varies by state — some use the federal HCPCS structure, others have state-specific codes, so multi-state practices need payer-specific rules for each program.
Payers routinely require prior auth for SUD residential treatment when they don't for comparable medical stays, or apply session limits with no equivalent limit on outpatient PT — and most providers don't push back.
A note that just says "patient needs residential treatment" doesn't support medical necessity; documentation needs to speak to the six ASAM dimensions payers actually use as their framework.
G0396/G0397/99408/99409 claims deny without the specific screening tool used (AUDIT, DAST-10, CAGE, CRAFFT), the score, and the intervention provided.
Most residential and IOP denials happen mid-stay when a payer decides the patient no longer meets criteria, not at admission — without a concurrent review workflow, authorizations lapse.
Key Procedure Codes
Our coders hold specialty-specific credentials and train continuously on the codes that drive the most revenue — and the most denials — in substance use disorder billing.
| Code | Description | Common Issue |
|---|---|---|
| 99212-99215 | OBOT E/M visit levels (buprenorphine prescribing) | Prescription itself isn't separately billable — it's part of the E/M |
| G2067-G2080 | OTP bundled weekly payment codes | Medicaid billing varies by state — federal HCPCS vs state-specific codes |
| G0396/G0397 | SBIRT alcohol/drug assessment (15-30 min / 30+ min) | Primarily Medicaid; document screening tool, score, intervention |
| 99408/99409 | SBIRT screen + brief intervention (commercial/Medicare) | Same documentation standard as the G-codes |
| H0015 / S0201 | Intensive Outpatient Program / Partial Hospitalization | IOP needs 3+ hrs/day, 3+ days/week; PHP needs 6+ hrs/day, 5 days/week |
| H0010/H0018/H0019 | Residential SUD (non-hospital) | Requires prior auth, ASAM criteria, daily census reporting |
Why Rcmaxis
We're not a generalist billing service that added a specialty module. Our team is built around specialty-specific expertise.
Every coder on your account holds the specialty coding credential relevant to substance use disorder treatment — not a generic CPC only.
Built around ASAM-based medical necessity documentation, parity-violation tracking, and OTP/OBOT billing model separation that decide whether SUD claims get paid.
Full EHR integration, payer enrollment verification, and charge capture setup in 2 weeks — with zero disruption to your treatment schedule.
One point of contact who knows your practice, your payers, and your billing history — available for weekly calls and monthly performance reviews.
Month-to-month engagement. We earn your business every month by improving your collections — not by locking you in.
Live visibility into your collections, denial rate, aging AR, and payer performance — updated daily, reviewed monthly with your account team.
Straight answers to what providers usually ask before they switch.
Free revenue assessment for qualified practices. We audit your last 90 days of claims, identify every revenue leak, and show you a clear path to better collections — at no cost.