Summary & Overview
HCPCS A4425: Drainable Ostomy Pouch with Filter, Two-Piece System
HCPCS Level II code A4425 designates a drainable ostomy pouch intended for use with a non-locking flange barrier and an integrated filter as part of a two-piece ostomy system. Ostomy supplies are essential for ongoing management of intestinal or urinary diversion and have broad national relevance due to chronic and post-surgical needs among patients requiring long-term stoma care. Coverage and utilization of ostomy appliances affect durable medical equipment (DME) budgets and patient access to necessary supplies.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The publication summarizes typical coverage considerations, reimbursement benchmarks, and clinical context for A4425, with attention to supply classification, common sites of service such as home health and outpatient supply channels, and implications for claims processing.
Readers will learn a concise description of the code and its clinical role, the expected service setting, payer coverage landscape, common billing modifiers observed in practice, and where to find related billing and policy guidance. Data not available in the input is clearly indicated where applicable.
Billing Code Overview
HCPCS Level II code A4425 describes an ostomy pouch, drainable; for use on barrier with non-locking flange, with filter (2 piece system), each. This item is a disposable or replaceable component of ostomy management systems used to collect effluent from a surgically created stoma.
Service type: Ostomy appliance / durable medical supply
Typical site of service: Home health care, outpatient supply distribution, long-term care facilities, and other non-acute settings where patients perform ostomy self-care or receive nursing support
Clinical & Coding Specifications
Clinical Context
A typical patient is a 65-year-old individual with a surgically created end colostomy following colorectal cancer resection who requires routine ostomy pouch supplies. The clinician (wound, ostomy, and continence nurse or ostomy-enterostomal therapist) assesses pouching needs during an outpatient clinic visit or home health visit. The clinician documents stoma size and shape, skin integrity of the peristomal area, and patient ability to manage a two-piece system with a non-locking flange. A drainable ostomy pouch with a built-in filter (A4425) is selected when the patient produces effluent requiring drainage and when gas venting is needed to reduce ballooning. The product is furnished per pouch (each) and dispensed with a compatible barrier (non-locking flange). Typical workflow: assessment and measurement of the stoma, selection of pouch type (drainable, filter-equipped, two-piece compatible), patient education on emptying and filter care, documentation of product supplied and quantity, and submission of claim using HCPCS code A4425 and appropriate modifiers reflecting payer and service circumstances. Typical sites of service include outpatient clinics, home health settings, and durable medical equipment suppliers supporting community-based ostomy care.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier | Standard submission when no additional modifier applies |
52 | Reduced services | When fewer pouches are provided than originally planned or partial supply is furnished |
53 | Discontinued procedure | If supply delivery is canceled after initiation of furnishing process |
59 | Data not provided in the input | Data not available in the input |
62 | Two surgeons | Data not provided in the input |
78 | Return to operating room | Data not provided in the input |
80 | Assistant surgeon | Data not provided in the input |
82 | Assistant surgeon (when no qualified resident) | Data not provided in the input |
AS | Physician assistant, nurse practitioner, or clinical nurse specialist services for Medicare | Use when a qualifying non-physician clinician furnishes related education or fitting services for Medicare beneficiaries |
KX | Requirements specified in the medical policy have been met | When documentation supports payer-specific coverage criteria for ostomy supplies |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
364S00000X | Wound Care Specialist | Common clinician for ostomy appliance fitting and management |
363L00000X | Enterostomal Therapist | Specialized in ostomy and peristomal skin care |
364A00000X | Home Health Care Provider | Provides home visits for supply fitting and education |
261QM0800X | General Surgery | Surgeons who perform ostomy creation and postoperative supply needs |
207RC0000X | Physical Medicine & Rehabilitation | May coordinate long-term adaptive needs for ostomy patients |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
K51.90 | Ulcerative colitis, unspecified, without complications | Inflammatory bowel disease leading to colectomy and ostomy creation requiring drainage pouches |
K51.92 | Ulcerative colitis, unspecified, with unspecific complications | Complicated disease may result in ostomy formation necessitating ongoing pouch supplies |
K57.30 | Diverticulitis of large intestine without perforation or abscess | Surgical resection for complicated diverticulitis can result in temporary or permanent ostomy care needs |
C18.9 | Malignant neoplasm of colon, unspecified | Colorectal cancer often leads to colectomy and permanent or temporary ostomy requiring drainable pouches |
K35.80 | Acute appendicitis without perforation or abscess | Postoperative complications from abdominal surgery may necessitate ostomy in complex cases |
N99.89 | Other postprocedural complications and disorders of genitourinary system | Included for patients who have ostomy related postoperative issues affecting pouching needs |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
97762 | Prosthetic training, upper extremity, lower extremity, or trunk, single or multiple prosthetic training sessions, per session | Used when a patient requires training to manage an ostomy pouching system as part of prosthetic/assistive device training sessions |
99401 | Preventive medicine counseling and/or risk factor reduction intervention; approximately 15 minutes | Used for brief education or counseling about ostomy self-care and pouch management during an office visit |
99404 | Preventive medicine counseling; approximately 45 minutes | Used for more extensive education on ostomy care, skin protection, and supplies selection |
G0156 | Services performed by a qualified physical therapist in the home health or hospice setting, each 15 minutes | Used when home health clinicians provide in-home ostomy education and pouching assistance |
E1399 | Durable medical equipment, miscellaneous | Occasionally used by suppliers for billing non-specific ostomy accessories not otherwise classified |