A4594 – Neuromodulation stimulator system, adjunct to rehabilitation therapy regime, mouthpiece each
HCPCS Level II code · A codes: Transportation, Medical & Surgical Supplies, Miscellaneous & Experimental
HCPCS codeA4594
- Long description
- Neuromodulation stimulator system, adjunct to rehabilitation therapy regime, mouthpiece each
- Short description
- Neuromod adj rehab mouthpie
- Pricing indicator
32DME – inexpensive & routinely purchased- Medicare coverage
CCarrier judgment – coverage decided by the Medicare contractor- BETOS category
D1EOther DME- Added
- April 1, 2024
- Last change
- January 1, 2025 – No change
Frequently asked questions
What is HCPCS code A4594?
A4594 is a HCPCS Level II code for neuromodulation stimulator system, adjunct to rehabilitation therapy regime, mouthpiece each.
Does Medicare cover A4594?
The HCPCS file lists coverage code C: Carrier judgment – coverage decided by the Medicare contractor. Coverage and payment also depend on local coverage determinations and the patient’s plan.
Nearby A codes
- A4564 – Pessary, disposable, any type
- A4565 – Slings
- A4566 – Shoulder sling or vest design, abduction restrainer, with or without swathe control, prefabricated, includes fitting and adjustment
- A4570 – Splint
- A4575 – Topical hyperbaric oxygen chamber, disposable
- A4580 – Cast supplies (e.g., plaster)
- A4590 – Special casting material (e.g., fiberglass)
- A4593 – Neuromodulation stimulator system, adjunct to rehabilitation therapy regime, controller
- A4595 – Electrical stimulator supplies, 2 lead, per month, (e.g., tens, nmes)
- A4596 – Cranial electrotherapy stimulation (ces) system supplies and accessories, per month
- A4600 – Sleeve for intermittent limb compression device, replacement only, each
- A4601 – Lithium ion battery, rechargeable, for non-prosthetic use, replacement
- A4602 – Replacement battery for external infusion pump owned by patient, lithium, 1.5 volt, each
- A4604 – Tubing with integrated heating element for use with positive airway pressure device
- A4605 – Tracheal suction catheter, closed system, each
- A4606 – Oxygen probe for use with oximeter device, replacement
Source: CMS HCPCS Level II quarterly file, October 2026. Reference only – check payer policy before billing.