HCPCS Modifier AY

Item or service furnished to a patient that is not for the treatment of ESRD.


  • Submit this modifier on Part B claims for end-stage renal disease (ESRD) patients for specific lab services and drugs/biologicals that are not related to the treatment for ESRD. This modifier will allow payment for these non-ESRD services outside of the ESRD Prospective Payment System (PPS) if all other coding and coverage requirements are met (excluding services/drugs that CMS has determined to always be included in the PPS).


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

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