A4331 — Extension drainage tubing, any type, any length, with connector/adaptor, for use with urinary leg bag or urostomy pouch, each
A4331 is a HCPCS Level II code for extension drainage tubing, any type, any length, with connector/adaptor, for use with urinary leg bag or urostomy pouch, each. It belongs to the Transportation, Medical & Surgical Supplies, Administrative section. Whether Medicare pays it depends on the coverage rule below.
Medicare coverage: Special coverage instructions apply
There are published conditions attached to this code. Check the applicable coverage policy before billing it: the code being valid is not the same as the service being covered.
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 A4331 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 3 — Date of Service Edit: Clinical · Clinical: Data
- outpatient
- 3 units MAI 3 — Date of Service Edit: Clinical · Clinical: Data
- DME supplier
- 6 units MAI 3 — Date of Service Edit: Clinical · Clinical: Data
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 A4331
- Long descriptor
- Extension drainage tubing, any type, any length, with connector/adaptor, for use with urinary leg bag or urostomy pouch, each
- Short descriptor
- Extension drainage tubing
- Added
- January 1, 2001
- BETOS
- D1F
- Pricing indicator
- 37 — 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.
Ostomy, tracheostomy and urological supplies. Price subject to floors and ceilings.
Codes adjacent to A4331
HCPCS has no hierarchy — related items simply sit next to each other in the numbering. If A4331 is not quite right, the correct code is very often within a few positions of it.
- A4318Female external urinary collection cup, with or without ring attachment, per day
- A4320Irrigation tray with bulb or piston syringe, any purpose
- A4321Therapeutic agent for urinary catheter irrigation
- A4322Irrigation syringe, bulb or piston, each
- A4326Male external catheter with integral collection chamber, any type, each
- A4327Female external urinary collection device; meatal cup, each
- A4328Female external urinary collection device; pouch, each
- A4330Perianal fecal collection pouch with adhesive, each
- A4332Lubricant, individual sterile packet, each
- A4333Urinary catheter anchoring device, adhesive skin attachment, each
- A4334Urinary catheter anchoring device, leg strap, each
- A4335Incontinence supply; miscellaneous
- A4336Incontinence supply, urethral insert, any type, each
- A4337Incontinence supply, rectal insert, any type, each
- A4338Indwelling catheter; foley type, two-way latex with coating (teflon, silicone, silicone elastomer, or hydrophilic, etc.), each
- A4340Indwelling catheter; specialty type, (e.g., coude, mushroom, wing, etc.), each
Questions about A4331
What is HCPCS code A4331?
A4331 is a HCPCS Level II code for extension drainage tubing, any type, any length, with connector/adaptor, for use with urinary leg bag or urostomy pouch, each. It sits in the Transportation, Medical & Surgical Supplies, Administrative section.
Does Medicare cover A4331?
The CMS HCPCS file marks A4331 as "Special coverage instructions apply". There are published conditions attached to this code. Check the applicable coverage policy before billing it: the code being valid is not the same as the service being covered.
How is A4331 paid under the physician fee schedule?
A4331 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.