HCPCS Level II · Transportation, medical and surgical supplies
A4594Neuromodulation stimulator system, adjunct to rehabilitation therapy regime, mouthpiece each
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Source: CMS HCPCS quarterly update, October 2026. Page updated September 29, 2026.
About A4594
A4594 is an HCPCS Level II code in the A series (transportation, medical and surgical supplies), describing neuromodulation stimulator system, adjunct to rehabilitation therapy regime, mouthpiece each.
It was added to HCPCS effective 04/01/2024, and its current record took effect 01/01/2025.
Its Medicare coverage code is "C", meaning coverage is left to the Medicare contractor's judgment.
Details
- Short description
- Neuromod adj rehab mouthpie
- Date added
- 04/01/2024
- Action effective
- 01/01/2025
- BETOS
- D1E
Related A45xx codes
- A4500Surgical stockings below knee length, each
- A4510Surgical stockings full length, each
- A4520Incontinence garment, any type, (e.g., brief, diaper), each
- A4540Distal transcutaneous electrical nerve stimulator, stimulates peripheral nerves of the upper arm
- A4541Monthly supplies for use of device coded at e0733
- A4542Supplies and accessories for external upper limb tremor stimulator of the peripheral nerves of the wrist
- A4543Supplies for transcutaneous electrical nerve stimulator, for nerves in the auricular region, per month
- A4544Electrode for external lower extremity nerve stimulator for restless legs syndrome
- A4545Supplies and accessories for external tibial nerve stimulator (e.g., socks, gel pads, electrodes, etc.), needed for one month
- A4550Surgical trays
- A4553Non-disposable underpads, all sizes
- A4554Disposable underpads, all sizes
Common questions about A4594
Is HCPCS A4594 still valid?
- Yes. A4594 is active in the CMS October 2026 HCPCS file.
Does Medicare cover A4594?
- Its coverage code is "C": coverage is left to the Medicare contractor's judgment. Check the local coverage determination for your region.