A4596 — Cranial electrotherapy stimulation (ces) system supplies and accessories, per month
A4596 is a HCPCS Level II code for cranial electrotherapy stimulation (ces) system supplies and accessories, per month. 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 A4596 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.
- practitioner
- 1 unit MAI 2 — Date of Service Edit: Policy · Code Descriptor / CPT Instruction
- outpatient
- 1 unit MAI 2 — Date of Service Edit: Policy · Code Descriptor / CPT Instruction
- 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 A4596
- Long descriptor
- Cranial electrotherapy stimulation (ces) system supplies and accessories, per month
- Short descriptor
- Ces system monthly supp
- Added
- October 1, 2022
- BETOS
- D1E
- Pricing indicator
- 34 — 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.
DME supplies. Price subject to floors and ceilings.
Codes adjacent to A4596
HCPCS has no hierarchy — related items simply sit next to each other in the numbering. If A4596 is not quite right, the correct code is very often within a few positions of it.
- 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)
- A4593Neuromodulation stimulator system, adjunct to rehabilitation therapy regime, controller
- A4594Neuromodulation stimulator system, adjunct to rehabilitation therapy regime, mouthpiece each
- A4595Electrical stimulator supplies, 2 lead, per month, (e.g., tens, nmes)
- 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
- A4606Oxygen probe for use with oximeter device, replacement
- A4608Transtracheal oxygen catheter, each
- A4611Battery, heavy duty; replacement for patient owned ventilator
Questions about A4596
What is HCPCS code A4596?
A4596 is a HCPCS Level II code for cranial electrotherapy stimulation (ces) system supplies and accessories, per month. It sits in the Transportation, Medical & Surgical Supplies, Administrative section.
Does Medicare cover A4596?
The CMS HCPCS file marks A4596 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 A4596 paid under the physician fee schedule?
A4596 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.