A4 Modifier
Dressing for four wounds
HCPCS modifierA4
- Description
- Dressing for four wounds
- Short description
- Dressing for four wounds
- Added
- July 1, 2002
- Last change
- July 1, 2002
What does the A4 modifier mean?
The HCPCS Level II modifier A4 means: “Dressing for four wounds”. Append it to a HCPCS or CPT code on the claim line when the payer’s policy calls for it; placement and payment effects are defined by each payer.
Other A modifiers
- A1 – Dressing for one wound
- A2 – Dressing for two wounds
- A3 – Dressing for three wounds
- A5 – Dressing for five wounds
- A6 – Dressing for six wounds
- A7 – Dressing for seven wounds
- A8 – Dressing for eight wounds
- A9 – Dressing for nine or more wounds
- AA – Anesthesia services performed personally by anesthesiologist
- AB – Audiology 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
- AC – Initial onboarding support payment for access beneficiary enrollment, device/app setup, and care coordination activities; first month only; once per beneficiary per track
- AD – Medical supervision by a physician: more than four concurrent anesthesia procedures
- AE – Registered dietician
- AF – Specialty physician
- AG – Primary physician
- AH – Clinical psychologist
- AI – Principal physician of record
- AJ – Clinical social worker
- AK – Non participating physician
- AM – Physician, team member service
- AO – Alternate payment method declined by provider of service
- AP – Determination of refractive state was not performed in the course of diagnostic ophthalmological examination
- AQ – Physician providing a service in an unlisted health professional shortage area (hpsa)
- AR – Physician provider services in a physician scarcity area
- AS – Physician assistant, nurse practitioner, or clinical nurse specialist services for assistant at surgery
- AT – Acute treatment (this modifier should be used when reporting service 98940, 98941, 98942)
- AU – Item furnished in conjunction with a urological, ostomy, or tracheostomy supply
- AV – Item furnished in conjunction with a prosthetic device, prosthetic or orthotic
- AW – Item furnished in conjunction with a surgical dressing
- AX – Item furnished in conjunction with dialysis services
- AY – Item or service furnished to an esrd patient that is not for the treatment of esrd
- AZ – Physician providing a service in a dental health professional shortage area for the purpose of an electronic health record incentive payment