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Free Medical Coding > Free 2025 HCPCS Codes > 2025 HCPCS Modifiers > HCPCS ‘A’ Modifiers

HCPCS ‘A’ Modifiers

  • ModifierDescription
  • A1Dressing for one wound
  • A2Dressing for two wounds
  • A3Dressing for three wounds
  • A4Dressing for four wounds
  • A5Dressing for five wounds
  • A6Dressing for six wounds
  • A7Dressing for seven wounds
  • A8Dressing for eight wounds
  • A9Dressing for nine or more wounds
  • AAAnesthesia services performed personally by anesthesiologist
  • ABAudiology service furnished personally by an audiologist without a physician/npp order for non-acute hearing assessment unrelated to disequilibrium, or hearing aids, or examinations for the purpose of prescribing, fitting, or changing hearing aids; service may be performed once every 12 months, per beneficiary
  • ADMedical supervision by a physician: more than four concurrent anesthesia procedures
  • AERegistered dietician
  • AFSpecialty physician
  • AGPrimary physician
  • AHClinical psychologist
  • AIPrincipal physician of record
  • AJClinical social worker
  • AKNon participating physician
  • AMPhysician, team member service
  • AOAlternate payment method declined by provider of service
  • APDetermination of refractive state was not performed in the course of diagnostic ophthalmological examination
  • AQPhysician providing a service in an unlisted health professional shortage area (hpsa)
  • ARPhysician provider services in a physician scarcity area
  • ASPhysician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
  • ATAcute treatment (this modifier should be used when reporting service 98940, 98941, 98942)
  • AUItem furnished in conjunction with a urological, ostomy, or tracheostomy supply
  • AVItem furnished in conjunction with a prosthetic device, prosthetic or orthotic
  • AWItem furnished in conjunction with a surgical dressing
  • AXItem furnished in conjunction with dialysis services
  • AYItem or service furnished to an esrd patient that is not for the treatment of esrd
  • AZPhysician providing a service in a dental health professional shortage area for the purpose of an electronic health record incentive payment