Summary & Overview
HCPCS A6537: Gradient Compression Stocking, Full-Length 30-40 mmHg
HCPCS Level II code A6537 denotes a full-length (chap-style) gradient compression stocking providing 30–40 mmHg of pressure, billed per each stocking. Nationally, compression garments like this are important for outpatient management of chronic venous disease, lymphedema maintenance, and post-thrombotic care, representing a common durable medical equipment (DME) claim type that impacts both clinical care pathways and DME policy administration. Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of what the code covers, typical sites of service, and the clinical context for use. The publication outlines common payer coverage considerations, billing and coding nuances relevant to DME supply lines, and where available, benchmarking and policy update summaries. This resource is intended to help revenue cycle, compliance, and clinical supply teams understand how A6537 is described, where it is most commonly used, and the types of documentation and clinical indications that typically accompany durable medical equipment claims. Data not available in the input is noted where applicable.
Billing Code Overview
HCPCS Level II code A6537 represents a gradient compression stocking, full length/chap style, 30-40 mmHg, each. This item is a medical compression stocking designed to provide graduated compression from the ankle upward, commonly used to manage chronic venous insufficiency, lymphedema maintenance, post-thrombotic syndrome, or to support venous return in ambulatory patients.
Service type: Durable medical equipment / compression garment
Typical site of service: Outpatient settings, durable medical equipment suppliers, home use
Clinical & Coding Specifications
Clinical Context
A 68-year-old ambulatory patient with chronic venous insufficiency and symptomatic lower-extremity edema presents to a vascular clinic for compression therapy. The clinician evaluates the patient, documents indications such as venous stasis changes, aching and edema, and measures the leg for a full-length, chap-style compression stocking. The office places an order for a single A6537 gradient compression stocking, full length/chap style, 30–40 mmHg, and documents medical necessity, sizing, delivery date, and patient education on donning, wear schedule, and skin inspection. Billing is submitted by durable medical equipment or clinic billing staff with any required modifier (for example LT or RT for laterality) and linked to an appropriate ICD-10 diagnosis supporting coverage. Typical site of service is outpatient clinic, durable medical equipment (DME) supplier, or home health delivery when associated with homebound care.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
LT | Left side | When the stocking is supplied for the left lower extremity |