AJ HCPCS Level II modifier: Clinical social worker
AJ is a HCPCS Level II modifier: “Clinical social worker.” It adds this detail to the code it is reported with.
Official description
AJClinical social worker
HCPCS · United States
Medicare details
The indicators CMS publishes with AJ in its October 2026 file. They describe Medicare’s handling, not another payer’s.
- Medicare coverage
- Special coverage instructions apply
- Added
- Jan 1, 1991
Where AJ sits
- 1GroupHCPCS modifiers
- 2Modifier AJClinical social worker
Source and release
- Data release
- HCPCS Level II · October 2026
- Effective date
- Oct 1, 2026
- Publisher
- CMS
This page is built from the HCPCS Level II catalog that Vero Codes reads when it suggests codes: Centers for Medicare & Medicaid Services’s October 2026 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
What does HCPCS code AJ mean?
AJ is the HCPCS code for “Clinical social worker” in CMS’s HCPCS Level II October 2026 release.
Where is AJ in the HCPCS Level II list?
AJ is listed under Modifiers.
Does Medicare cover AJ?
CMS lists AJ’s Medicare coverage as “Special coverage instructions apply”. Coverage and payment still depend on the patient, the setting, the documentation and the payer.
Which HCPCS Level II release does this page use?
It uses CMS’s October 2026 release, in effect from Oct 1, 2026 to Dec 31, 2026. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.
Codes beside AJ
All modifiersADMedical supervision by a physician: more than four concurrent anesthesia proceduresAERegistered dieticianAFSpecialty physicianAGPrimary physicianAHClinical psychologistAIPrincipal physician of recordAKNon participating physicianAMPhysician, team member serviceAOAlternate payment method declined by provider of serviceAPDetermination of refractive state was not performed in the course of diagnostic ophthalmological examinationAQPhysician providing a service in an unlisted health professional shortage area (hpsa)ARPhysician provider services in a physician scarcity area