HCPCS A4410: Ostomy Skin Barrier with Flange, Extended Wear

HCPCS Level II code A4410 covers an ostomy skin barrier with a flange (solid, flexible, or accordion), designed for extended wear, without built-in convexity, and larger than 4 x 4 inches. These barriers are essential components of ostomy management, helping protect peristomal skin and secure ostomy pouches for patients living with colostomies, ileostomies, or urostomies. Nationally, this code is used across home health, outpatient durable medical equipment suppliers, and patient self-care settings, reflecting ongoing demand for advanced skin protection products as ostomy prevalence and outpatient management increase.

Key payers included in this analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context for the device, typical sites of service, and payer coverage considerations. The publication outlines common billing practices tied to A4410, typical use cases, and supply characteristics that influence coding and coverage decisions. It also identifies where input data is not available for this record (for example, associated taxonomies, ICD-10 diagnoses, and related codes) and directs readers to policy documents and payer-specific coverage guidelines for definitive coverage criteria. This summary is intended for billing professionals, DME suppliers, and policy analysts working at a national level.

Billing Code Overview

HCPCS Level II code A4410 describes an ostomy skin barrier with flange, specified as solid, flexible, or accordion style, extended wear, without built-in convexity, and larger than 4 x 4 inches, billed per item. Service type: Ostomy supply / medical durable equipment accessory. Typical site of service: home care or outpatient supplies setting, where patients manage ostomy appliances and skin protection outside acute inpatient care.

Clinical Context

A typical patient is an adult with a permanent or temporary stoma (colostomy, ileostomy, or urostomy) who requires an extended-wear ostomy skin barrier with flange larger than 4 x 4 inches. The patient may present for routine outpatient supply dispensing at a wound care clinic, home health visit, durable medical equipment (DME) provider pickup, or post-discharge supply coordination. Clinical workflow: a wound care nurse or ostomy nurse assesses stoma size, peristomal skin condition, and appliance fit; documents stoma measurements and skin integrity; determines barrier type (extended wear, flange, no built-in convexity); orders A4410 when a larger-than-4x4-inch, flange-type, solid/flexible/accordion skin barrier is required; supplies are billed through the patient’s durable medical equipment benefit or commercial medical supply coverage; education on application, removal, and skin monitoring is provided; follow-up arranged with the ostomy nurse or primary/surgical team as indicated.

Coding Specifications

Modifier	Description	When to Use
`00`	Default/No modifier	Use when no other modifier applies.
`11`

Taxonomy Code	Specialty	Notes
`185E00000X`	Ostomy/Wound Care Nurse	Performs assessment, fitting, and education for ostomy supplies.
`208000000X`	General Surgery	Surgeons who create ostomies and direct ongoing surgical care.
`231H00000X`	Enterostomal Therapist (ET Nurse)	Specializes in stoma management and appliance selection.
`333600000X`	Home Health Agency	Provides in-home supply delivery and nursing support for ostomy patients.
`261QM0800X`	Durable Medical Equipment Supplier	DME providers who supply and bill for ostomy barriers and related appliances.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`K63.1`	Perforation of intestine (nontraumatic)	May lead to fecal diversion and ostomy creation requiring ongoing ostomy barriers.
`C18.9`	Malignant neoplasm of colon, unspecified	Colorectal cancer often requires colectomy with colostomy; patients need ostomy supplies like `A4410`.
`K91.2`	Postprocedural intestinal obstruction	Postoperative complications can result in temporary ostomy and need for barriers.
`N36.9`	Disease of bladder, unspecified	Conditions leading to urinary diversion may require urostomies and large ostomy barriers.
`K90.89`	Other intestinal malabsorption	Complex GI disease management can include ostomy formation and long-term appliance needs.
`L30.9`	Dermatitis, unspecified	Peristomal dermatitis is a common indication for specialized, extended-wear skin barriers to protect irritated skin.
`Z43.3`	Encounter for attention to stoma (enterostomy)	Directly relevant for routine stoma care and supply management including ordering `A4410`.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`99213`	Office or other outpatient visit for the evaluation and management of an established patient, typically 15 minutes	Used when a clinician performs stoma assessment, documents need for a specific ostomy barrier, and orders `A4410` during an outpatient visit.
`99501`	Home visit for ostomy care (nursing) — patient education and wound/stoma care (Note: verify payer-specific CPT usage)	May be used by home health or visiting nurse services providing ostomy assessment, fitting, and education concurrent with supply provision.
`97597`	Debridement, open wound, without anesthesia; selective debridement may be performed for peristomal wound care	Performed when peristomal skin requires debridement prior to fitting or when managing complications that affect barrier performance.
`11042`	Debridement, subcutaneous tissue (Note: used when deeper peristomal procedures are necessary)	Relevant for operative or procedural management of complex peristomal wounds associated with ostomies.
`A9270`	Non-covered item or service (miscellaneous DME supply) — payer-specific use	Occasionally used by suppliers when a specific item is not listed under standard HCPCS and payer requires an alternate code; not a substitute for `A4410` when `A4410` applies.
`G0339`	Prolonged preventive service (first hour) — payer-specific	May be relevant for extended education sessions tied to ostomy supply training depending on payer policy.

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Summary & Overview