Most plans cover assessment, withdrawal management, high-intensity outpatient and intensive outpatient in-network, subject to the usual deductible and authorisation. Coverage narrows as the setting becomes more residential and more private, and each carrier applies its own review thresholds.
Routinely approved
Carriers rarely contest medically supervised withdrawal where the assessment documents withdrawal risk, because the clinical justification is explicit. Insurance approves structured outpatient programmes when the documentation names the dimensions requiring that intensity.
Approved with documentation
Most plans cover residential treatment but review it more closely than any other level, and the carrier grants continued-stay authorisation in increments against documented progress. This reflects process rather than hostility — but it explains why clinical documentation determines your bill.
Rarely covered
Private rooms, executive amenities and the difference between a standard residential rate and a private-programme rate. Also generally excluded: services delivered outside the United States, and experimental modalities without an evidence base.
Carrier-specific detail sits on the pages for Aetna, Blue Cross Blue Shield, Cigna, Humana and UnitedHealthcare.