A4593 — Neuromodulation stimulator system, adjunct to rehabilitation therapy regime, controller
A4593 is a HCPCS Level II code for neuromodulation stimulator system, adjunct to rehabilitation therapy regime, controller. It belongs to the Transportation, Medical & Surgical Supplies, Administrative section. Whether Medicare pays it depends on the coverage rule below.
Medicare coverage: Carrier judgment
Coverage is decided by your Medicare contractor, not by national policy. Whether this is paid depends on the LCD for your jurisdiction and on what the documentation supports.
From the coverage field of the CMS Alpha-Numeric HCPCS File, release 2026Q3-Jul. This states Medicare’s position on the code, not on your particular claim.
Physician fee schedule statusX
Statutory exclusion. The item or service is not within the statutory definition of 'physician services', so the fee schedule never pays it.
Global period: XXX
Want the dollar amount for your locality? The fee calculator applies your GPCI and the current conversion factor.
Medically Unlikely Edits — units per day
The most units of A4593 Medicare will pay on one date of service. Bill more on a single line and it is denied. The limit is not the same in every setting, so the row that matters is the one matching the claim you are building.
- DME supplier
- 1 unit MAI 2 — Date of Service Edit: Policy · Code Descriptor / CPT Instruction
The adjudication indicator decides whether exceeding the limit is worth appealing at all: MAI 1 is a line edit you can support with documentation, MAI 3 is a date-of-service edit that is also appealable, and MAI 2 is absolute — no documentation overrides it. CMS MUE 2026Q3.
The CMS record for A4593
- Long descriptor
- Neuromodulation stimulator system, adjunct to rehabilitation therapy regime, controller
- Short descriptor
- Neuromod sti sys adj rehab
- Added
- April 1, 2024
- BETOS
- D1E
- Pricing indicator
- 36 — DMEPOS
The official wording. This is what the code means.
CMS's 28-character form, which is what shows up on a remittance advice.
When CMS introduced the code.
Berenson-Eggers Type of Service — CMS's own analytic grouping.
Capped rental DME. Price subject to floors and ceilings.
Codes adjacent to A4593
HCPCS has no hierarchy — related items simply sit next to each other in the numbering. If A4593 is not quite right, the correct code is very often within a few positions of it.
- A4563Rectal control system for vaginal insertion, for long term use, includes pump and all supplies and accessories, any type each
- A4564Pessary, disposable, any type
- A4565Slings
- A4566Shoulder sling or vest design, abduction restrainer, with or without swathe control, prefabricated, includes fitting and adjustment
- A4570Splint
- A4575Topical hyperbaric oxygen chamber, disposable
- A4580Cast supplies (e.g., plaster)
- A4590Special casting material (e.g., fiberglass)
- A4594Neuromodulation stimulator system, adjunct to rehabilitation therapy regime, mouthpiece each
- A4595Electrical stimulator supplies, 2 lead, per month, (e.g., tens, nmes)
- A4596Cranial electrotherapy stimulation (ces) system supplies and accessories, per month
- A4600Sleeve for intermittent limb compression device, replacement only, each
- A4601Lithium ion battery, rechargeable, for non-prosthetic use, replacement
- A4602Replacement battery for external infusion pump owned by patient, lithium, 1.5 volt, each
- A4604Tubing with integrated heating element for use with positive airway pressure device
- A4605Tracheal suction catheter, closed system, each
Questions about A4593
What is HCPCS code A4593?
A4593 is a HCPCS Level II code for neuromodulation stimulator system, adjunct to rehabilitation therapy regime, controller. It sits in the Transportation, Medical & Surgical Supplies, Administrative section.
Does Medicare cover A4593?
The CMS HCPCS file marks A4593 as "Carrier judgment". Coverage is decided by your Medicare contractor, not by national policy. Whether this is paid depends on the LCD for your jurisdiction and on what the documentation supports.
How is A4593 paid under the physician fee schedule?
A4593 carries PFS status code X. Statutory exclusion. The item or service is not within the statutory definition of 'physician services', so the fee schedule never pays it.