Summary & Overview
HCPCS A6554: Below-Knee Gradient Compression Stocking, 40 mmHg or Greater
HCPCS Level II code A6554 represents a single, below-knee gradient compression stocking with compression of 40 mmHg or greater. As a widely used durable medical device, this code covers a high-compression stocking commonly prescribed for management of significant venous insufficiency, chronic edema, lymphedema, and post-thrombotic syndrome. Nationally, precise coding for high-compression hosiery matters for appropriate coverage determinations, durable medical equipment billing, and accurate claims processing.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of the clinical context for prescribing high-compression below-knee stockings, common sites of service and suppliers, and typical documentation elements that support medical necessity. The publication also summarizes payer coverage themes and benchmarks where available, notes common modifier usage and billing considerations, and highlights areas where policy updates or clarifications commonly occur for high-compression DME.
This summary is intended for billing professionals, DME suppliers, clinicians who prescribe compression hosiery, and policy analysts seeking a concise reference to HCPCS Level II code A6554 and its role in national billing and coverage conversations.
Billing Code Overview
HCPCS Level II code A6554 describes a gradient compression stocking, below knee, 40 mmHg or greater, each. This item is a durable medical device intended to provide graduated compression to the lower leg for management of venous insufficiency, edema, lymphedema, or related circulatory conditions.
Service Type: Durable Medical Equipment (DME) — compression garment
Typical Site of Service: Outpatient settings, DME suppliers, home use
Clinical & Coding Specifications
Clinical Context
A patient presents to an outpatient vascular clinic or durable medical equipment (DME) supplier with symptoms of lower-extremity venous insufficiency, chronic venous edema, or healing venous ulceration and has been assessed by the treating clinician as appropriate for therapeutic-grade compression. The typical patient is an adult with unilateral or bilateral leg swelling, aching, or recurrent venous stasis changes who requires a below-knee compression stocking delivering 40 mmHg or greater at the ankle. Clinical workflow: history and focused vascular exam; measurement of limb circumference and length; documentation of indication (for example, venous insufficiency, post-thrombotic syndrome, lymphedema adjunctive use, or protection of healed venous ulcer); prescription specifying A6554 (gradient compression stocking, below knee, 40 mmHg or greater, each) including laterality; fitting by a certified fitter or DME technician; delivery with patient education on wear schedule and skin checks; and documentation of medical necessity in the medical record for DME billing and prior authorization when required.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier | Use when no special circumstances apply and a single stocking is billed without additional modifiers |