Summary & Overview
HCPCS A4429: Urinary Ostomy Pouch, One-Piece with Tap
HCPCS Level II code A4429 designates a one-piece urinary ostomy pouch with an attached barrier, built-in convexity, and a faucet-type tap with valve. This supply is used for urinary diversion in patients with a urostomy and is commonly provided for home use, outpatient ostomy clinics, and long-term care settings. The code matters nationally because ostomy supplies represent recurring durable medical equipment costs, influence outpatient supply coverage policies, and affect patient quality of life and self-care capability.
Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context and service setting for A4429, guidance on typical billing considerations, and pointers to areas where coverage policies and reimbursement practices commonly vary. The publication outlines benchmark topics such as typical site-of-service usage, common supply features (one-piece systems, built-in convexity, drainage taps), and how these product attributes factor into payer coverage decisions. Policy updates and payer-specific prior authorization or documentation requirements are highlighted when available; if payer-specific details are not provided, the report notes that data is not available in the input.
This national-level summary is intended for billing managers, ostomy product suppliers, and clinicians involved in ostomy care who need a clear reference to the code’s clinical purpose and where it is typically used.
Billing Code Overview
HCPCS Level II code A4429 describes an ostomy pouch for urinary diversion that is a one-piece system with an attached barrier, built-in convexity, and a faucet-type tap with valve. This device is intended to collect urinary output for patients with a urinary stoma and integrates the pouch and skin barrier into a single unit with a draining tap.
Service type: Durable Medical Equipment / Ostomy Supplies
Typical site of service: Home use or outpatient settings where patients manage urinary stomas, including home health, long-term care facilities, and outpatient ostomy clinics.
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult with a urostomy following cystectomy for bladder cancer or neurogenic bladder who requires an ostomy pouch system. The billed supply is a one-piece urinary ostomy pouch with an attached skin barrier, built-in convexity to improve stoma seal and protrusion control, and a faucet-type tap with valve for urinary drainage. The patient receives this supply in an outpatient durable medical equipment (DME) or home health supply setting, often prescribed by a urologist, ostomy nurse, or wound-ostomy-continence (WOC) nurse. Clinical workflow: the prescriber documents indication (e.g., post-cystectomy urostomy), stoma characteristics (size, retraction, peristomal skin condition), and rationale for convexity and a tap-style drainage feature. A DME supplier processes the order, verifies payer coverage, selects appropriate size/skin barrier, dispenses the product, and provides patient education on pouch changes, emptying via the faucet-type valve, and skin care. Follow-up visits with the ostomy nurse or urologist assess fit, leakage, and peristomal skin integrity; adjustments or alternative supplies are ordered as needed.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier | Use when no specific modifier applies for payer reporting. |
11 |