Maryland behavioral health, ABA, and SUD billing shifted materially in 2026. HealthChoice managed care carve-outs, the state’s ABA rate methodology update, and the Medicaid Behavioral Health Administration (BHA) transition of Optum Maryland services to Carelon have created new denial-driver categories most in-house billing teams are still catching up to.
We audit Maryland BH/ABA/SUD practices monthly.
The 2026 Maryland Denial Pattern
1. Optum Maryland to Carelon Behavioral Health Transition
Optum’s contract as Maryland’s Public Behavioral Health System (PBHS) Administrative Service Organization (ASO) ended in 2025. Carelon Behavioral Health picked up the contract with new claim submission requirements, new modifier logic, and different edit rules. Practices submitting under old Optum edits are seeing denial rates spike 10-16% on Medicaid BH claims. Fix: Carelon-specific claim edit audit + resubmission cycle.
2. HealthChoice MCO Payer Mix Confusion
Maryland’s HealthChoice program spreads Medicaid enrollees across 8 MCOs (Priority Partners, Maryland Physicians Care, UnitedHealthcare Community Plan, others), each with different auth requirements and documentation standards. Claims to wrong MCO or wrong prior-auth format are auto-denied. Fix: MCO-specific claim submission workflow + eligibility verification before service delivery.
3. Maryland ABA Rate Methodology Update + 97153/97155 Documentation
Maryland’s ABA rate methodology tightened documentation requirements for 97153 and 97155. Missing supervision-hour documentation triggers retro-denials 60-90 days post-payment. Fix: documentation template rebuild — every 97155 needs BCBA supervision time entries plus protocol modification justification.
Where the Recoverable Money Sits
Across ~50 free audits we’ve run in states with 2025-2026 regulatory shifts: 4-8% of net revenue stuck in fixable denial categories, $180K-$800K per practice per year recoverable.
MHPAEA Parity — The Sleeper Category
Beyond MD-specific changes, MHPAEA parity remains the largest recoverable denial category. Commercial payers (CareFirst BCBS, UnitedHealthcare, Cigna) systematically undercode 90837 to 90834 on BH claims, deny SUD residential stays for medical necessity, and downcode IOP days. Our benchmark: 12-18% of BH commercial denials from major payers are parity-appealable. Maryland Insurance Administration has been active on parity enforcement 2025-2026.
Case Study
12-site outpatient BH network, $70M revenue. Starting denial rate: 12.3%. After 90 days: 5.7%. MHPAEA parity recovery: $184K. Total cash recovered: $1.04M in 90 days. Annualized run-rate impact: $2.8M+ on $70M base. Read the full case study.
What Maryland Multi-Site Operators Should Do This Quarter
If you run a BH, ABA, or SUD practice in Maryland at $5M+ annual revenue and haven’t done a structured denial audit in 12 months, you’re leaving $180K-$800K per year on the table. Priority order: Carelon transition compliance (2 weeks), MCO-specific workflow (4 weeks), 97153/97155 documentation template (6 weeks). MHPAEA parity applies universally.
Free 30-Day Denial Audit
We audit your last 90 days of denied claims: denial-pattern report, MD-specific gap analysis (Carelon/HealthChoice MCO/ABA rate), MHPAEA parity opportunity ($), aged A/R recovery plan, cash-recovery estimate. You keep the findings whether or not you engage us.
Book your free audit – 15 minute intro call
Or email kannadasanl@revenantcare.com. Call +1 (855) 997-9989.
– KD, Founder, Revenant Care. Pricing: 4-8% of collections.