South Carolina behavioral health, ABA, and SUD billing shifted in 2026. The state’s Medicaid managed care restructuring, ABA authorization requirement changes, and Absolute Total Care/Molina policy updates have created three new denial-driver categories most in-house billing teams have not caught up to.
We audit SC BH/ABA/SUD practices monthly. Here is what we are seeing.
The 2026 South Carolina Denial Pattern
1. Absolute Total Care (Centene) ABA Authorization Tightening
Absolute Total Care has been the largest ABA payer for SC Medicaid pediatric autism cases. In Q1 2026 they tightened prior authorization requirements for 97153 and 97155, adding new documentation requirements and shorter auth windows (some down to 6 months from 12). Practices billing under old auth periods are seeing denial rates spike 10-15%.
Fix: Auth-window audit against ATC’s current schedule + prior-auth-batch resubmission for lapsed authorizations.
2. First Choice by Select Health / Molina Documentation Standards
Molina Healthcare of SC and First Choice by Select Health have both updated documentation requirements for 90837, H0038, and H2019 in 2026. Missing progress note elements are triggering retro-denials 45-90 days post-payment.
Fix: Progress note template rebuild. Every 90837 must have session start/stop times, treatment goals addressed, clinical response, and next-session plan. H0038 needs peer credential + supervision hours documentation.
3. SC First Steps + BabyNet ABA Bridging
SC’s Part C early intervention program (BabyNet) has documentation-bridging requirements when a child transitions to ABA at age 3. Claims submitted without the BabyNet-to-ABA bridge documentation are auto-denied by ATC and Molina.
Fix: BabyNet transition documentation workflow at intake for any child aged 2-4.
Where the Recoverable Money Sits
Across ~50 free audits we have run for BH/ABA/SUD practices in states with 2025-2026 regulatory shifts, we typically find 4-8% of net revenue stuck in fixable denial categories, translating to $180K-$800K per practice per year recoverable.
For an SC BH or ABA practice at $10-50M annual revenue, that is meaningful money currently going uncollected.
MHPAEA Parity – Still the Sleeper Category
Beyond SC-specific changes, MHPAEA parity remains the largest recoverable denial category we surface. Commercial payers (BlueChoice HealthPlan SC, United, 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. SC’s Department of Insurance 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 SC Multi-Site Operators Should Do This Quarter
If you run a BH, ABA, or SUD practice in South Carolina at $5M+ annual revenue and have not done a structured denial audit in 12 months, you are leaving $180K-$800K per year on the table. Priority order: ATC auth-window compliance (2 weeks), Molina/First Choice documentation template (4 weeks), BabyNet bridging workflow (6 weeks). MHPAEA parity applies universally.
Free 30-Day Denial Audit
We audit your last 90 days of denied claims: denial-pattern report by payer + code, SC-specific gap analysis (ATC/Molina/First Choice), MHPAEA parity opportunity estimate ($), aged A/R recovery plan, cash-recovery estimate. You keep the findings whether or not you engage us. No cost, no contract, no obligation to switch billers.
Book your free audit – 15 minute intro call
Or email kannadasanl@revenantcare.com. Call +1 (855) 997-9989.
– KD, Founder, Revenant Care. Specialty BH/ABA/SUD Revenue Cycle Management. Pricing: 4-8% of collections.