HCPCS Modifier AJ

Clinical social worker.

This modifier is not required. To avoid possible rejections, we suggest it not be submitted.


  • MLN Matters Article MM8010 (PDF, 110 KB): Update To Publication 100-04, Claims Processing Instructions For Chapter 12, Non-Physician Practitioners (NPPs)
  • CMS Change Request 8010, February 2013

Contact Palmetto GBA JM Part B Medicare

Email Part B

Contact a specific JM Part B department

Provider Contact Center: 855-696-0705

TDD: 866-830-3188

Other Palmetto GBA Sites

Palmetto GBA Home

DMEPOS Competitive Bidding Program

Jurisdiction J Part A MAC

Jurisdiction J Part B MAC

Jurisdiction M Part A MAC

Jurisdiction M Part B MAC

Jurisdiction M Home Health and Hospice MAC


National Supplier Clearinghouse MAC


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RRB Specialty MAC Beneficiaries



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