ASAM 3.5 vs 3.7 SUD Residential Billing — 2026

ASAM 3.5 — Clinically Managed Medium-Intensity Residential

• 24-hour non-medical residential care
• Structured therapeutic environment
• Requires 5+ hours clinical services per week
• Per-diem rate typically $250-$500/day
• Length of stay: 30-90 days typical

ASAM 3.7 — Medically Monitored High-Intensity Residential

• 24-hour medical monitoring available
• Nurse + physician on-call or on-site
• Higher clinical intensity
• Per-diem rate typically $500-$1,000/day
• Length of stay: 14-45 days typical

Common Denial Patterns

1. Payer down-codes 3.5 to 3.3 (partial hospitalization rate)
2. Payer down-codes 3.7 to 3.5
3. Payer denies continued stay after 21 days
4. Payer requires step-down documentation

Appeal Strategy

• Include ASAM Multidimensional Assessment
• Cite specific dimension scores requiring current LOC
• Document withdrawal + comorbidity risks
• Include peer review letter of medical necessity

SUD Billing Services

– KD, Revenant Care