Revenue code
Revenue Code 1002: Residential Treatment, Chemical Dependency
Revenue code 1002 is chemical dependency residential treatment. How SUD residential and detox programs bill it, HCPCS pairings and common denials.
Last reviewed October 2026
Meaning
1002: Behavioral health accommodations: residential treatment, chemical dependency
When facilities use 1002
1002 is the accommodation code for substance use disorder residential treatment. Some payers also use it for residential withdrawal management with an H code on the line, so the same revenue code can carry very different services.
HCPCS pairings in payer guides
| Payer guide | Pairing |
|---|---|
| Evernorth Behavioral Health | 1002 for substance use residential, no HCPCS |
| Point32Health | 1002 + H0011 for acute treatment services; 1002 + H0010 for a Level 3.5 clinical stabilization service |
| BCBS of Mississippi | 1002 as an accommodation line, days as units, type of bill 086X |
Because 1002 can mean residential treatment or residential detox depending on the HCPCS, a missing or wrong H code is a common reason these claims deny.
Common denials and fixes
- Missing HCPCS where the payer requires one. CO-16 with M51. Add the code from the payer's guide.
- Medical necessity. CO-50. In California, DMHC independent reviewers overturned 83% of SUD residential denials that reached them in 2021 to 2026 (an upper bound).
- Authorization for a different level. N54 or CO-284 when the auth is for detox but the claim bills residential, or the reverse.
- Coverage ended mid-stay. CO-27. Re-check eligibility during long stays.
Questions
What is revenue code 1002?
Residential treatment, chemical dependency: the per day accommodation code for substance use residential programs.
Can detox be billed under 1002?
At some payers, yes, with H0010 or H0011 on the line. Others bill inpatient detox on a detox room and board code such as 0126.
Should I bill 1001 or 1002 for co-occurring disorders?
Evernorth's guide lists 1001 or 1002 for dual diagnosis residential. Use the primary diagnosis and the payer's rule.
Sources
- Noridian Healthcare Solutions (Medicare contractor), Revenue codes (opens in a new tab)
- Evernorth Behavioral Health, Authorization and Billing Resource (PDF) (opens in a new tab)
- Point32Health, Inpatient and Intermediate/Diversionary BH/SUD Facility payment policy, rev. 06/2026 (PDF) (opens in a new tab)
- Blue Cross & Blue Shield of Mississippi, Behavioral Health Coding Policy (opens in a new tab)
Educational summary, not billing advice. Your contract and the payer's current guide decide how to bill.