Summary & Overview
HCPCS A4405: Ostomy Skin Barrier Paste, Non-Pectin, Per Ounce
HCPCS Level II code A4405 designates a non-pectin based ostomy skin barrier in paste form, billed per ounce. Ostomy skin barriers and pastes are essential consumable supplies for patients with stomas; they protect peristomal skin, improve pouch adhesion, and reduce leakage risk. Nationally, proper coding for these supplies affects coverage determinations, durable medical equipment benefit administration, and patient access to necessary ostomy supplies.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise national overview of clinical context for the supply, common payer considerations, and the typical sites of service where the product is used (outpatient clinics, home health, DME suppliers, and patient self-care at home). The publication outlines benchmarks and reimbursement context where available, notes common modifiers used with supply billing, and highlights policy and coverage themes relevant to ostomy supplies. This resource is intended to support billing staff, clinicians, and policy analysts in understanding how A4405 functions within supply provisioning and payer processes.
Data not available in the input for payer-specific rates, associated taxonomies, ICD-10 pairings, and related codes.
Billing Code Overview
HCPCS Level II code A4405 describes an ostomy skin barrier, non-pectin based, paste, billed per ounce. This supply is used to protect peristomal skin and create a seal between the skin and ostomy pouching systems. The service type is ostomy supply / skin protection paste, and the typical site of service is outpatient or home care settings where ostomy supplies are applied and managed, including durable medical equipment suppliers, home health, and patient self-care at home.
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Clinical & Coding Specifications
Clinical Context
A patient with a permanent or temporary stoma (ileostomy, colostomy, or urostomy) presents for routine ostomy supply management. The clinician assesses peristomal skin integrity and notes areas of excoriation or leaking around the stoma appliance. A non-pectin based ostomy skin barrier paste (A4405) is selected and dispensed in measured ounces to fill creases, seal irregular peristomal contours, or to help secure an adhesive flange. The clinical workflow includes wound/ostomy nurse assessment, selection of barrier paste based on skin condition and appliance compatibility, measurement and documentation of amount dispensed (per ounce), patient education on application technique, and documentation of diagnosis codes tied to stoma etiology and skin complications. Typical site of service is outpatient wound/ostomy clinic, home health visit, or outpatient durable medical equipment (DME) supply dispensing location. The typical patient scenario is an adult with an existing stoma experiencing peristomal skin irritation and appliance leakage who requires a non-pectin based paste to protect skin and achieve a secure seal for a pouching system.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | Default/No modifier | Use when no modifier applies to the service. |