Date
Providers must use the appropriate modifier(s) when billing ABA services in order to ensure correct reimbursement.
- Behavior analysts and psychologists must use modifier HO.
- Assistant behavior analysts must use modifier HN.
- Services provided by Registered Behavior TechniciansTM (RBT) must use the modifier HM along with the appropriate modifier for the supervisor (i.e., HO for behavior analyst or psychologist; HN for assistant behavior analyst).
- Psychologists should not use the AH modifier when billing ABA procedure codes.
- The U8 modifier should be used for services billed with a Place of Service 12 (home) or 99 (other).
- However, do NOT use the U8 modifier when billing for services provided by an RBT.