Delaware behavioral health, ABA, and SUD billing shifted in 2026. State Medicaid MCO reprocurement, CCBHC expansion, and evolving ABA rules created new denial-driver categories most in-house billing teams have not caught up to.

The 2026 Delaware Denial Pattern

1. Medicaid MCO Payer Mix

Delaware Medicaid enrollees spread across DE Diamond State Health Plan MCO (AmeriHealth Caritas DE/Highmark Blue Cross Blue Shield DE). Practices submitting under old edits see 10-14% denial-rate spikes.

Fix: MCO-specific claim workflow + eligibility verification.

2. CCBHC + Community Mental Health Center Expansion

Delaware expanded CCBHC certification 2025-2026. PPS rate reconciliation requires encounter-tracking discipline.

Fix: CCBHC PPS reconciliation workflow.

3. ABA 97153/97155 + Autism Benefit

Delaware commercial and Medicaid ABA payers tightened prior auth for 97153 and 97155 in 2026. Missing supervision-hour documentation triggers retro-denials 60-90 days post-payment.

Fix: Documentation template rebuild — every 97155 needs BCBA supervision time.

Where the Recoverable Money Sits

4-8% of net revenue = $180K-$800K per practice per year recoverable.

MHPAEA Parity — Sleeper Category

Commercial payers (Highmark BCBS Delaware, Aetna, Cigna, UnitedHealthcare) systematically undercode 90837 to 90834, deny SUD residential stays, downcode IOP. Benchmark: 12-18% of BH commercial denials are parity-appealable.

Case Study

12-site outpatient BH network, $70M revenue. Denial rate 12.3% → 5.7%. MHPAEA parity recovery: $184K. $1.04M cash recovered in 90 days. Full case study.

Free 30-Day Denial Audit

We audit your last 90 days of denied claims — denial-pattern report, Delaware-specific gap analysis, MHPAEA parity opportunity ($), aged A/R recovery plan.

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.