Summary & Overview
HCPCS A6536: Gradient Compression Stocking, Full-Length 18–30 mmHg
HCPCS Level II code A6536 represents a gradient compression stocking, full-length/chap style, providing 18–30 mmHg of compression, billed per item. This code matters nationally as compression stockings are a common conservative therapy for venous insufficiency, lymphedema management, post-thrombotic syndrome, and edema control; they affect durable medical equipment (DME) utilization and outpatient supply billing across payers. Key payers covered in this overview include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the clinical role of the product, typical sites of service where the item is supplied, payer coverage patterns and benchmarks where available, billing and documentation considerations, and related policy and coding contexts. The summary highlights what is known and notes where input data are not available. This publication provides clinicians, DME suppliers, and revenue cycle staff with an accessible reference to the code’s clinical description, payer coverage landscape, and common billing considerations relevant to national practice.
Billing Code Overview
HCPCS Level II code A6536 describes a gradient compression stocking, full length/chap style, with 18-30 mmHg compression, supplied per item. This item is a durable medical supply intended to provide graduated compression to the lower extremity to assist with venous return and edema control.
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Service type: Medical supply / compression therapy
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Typical site of service: Outpatient settings, home health, durable medical equipment suppliers, and clinical offices where compression garments are fitted or dispensed.
Clinical & Coding Specifications
Clinical Context
A patient with chronic venous insufficiency or symptomatic superficial venous disease is evaluated in an outpatient vascular clinic. The clinician documents indications such as leg swelling, heaviness, varicosities, or history of venous ulceration and prescribes gradient compression stockings to reduce edema, improve venous return, and support healing. A licensed clinician (vascular surgeon, wound care specialist, or primary care provider) measures the patient’s limb for a full-length/chap style stocking and writes an order specifying compression strength 18-30 mmHg and laterality (LT or RT) if applicable. The durable medical equipment (DME) supplier dispenses one stocking per order, verifies Medicare or commercial payer coverage, and bills using HCPCS Level II code A6536 for each stocking supplied. Typical sites of service include outpatient vascular clinics, wound care centers, home health visits, and DME supplier locations. Common workflow elements: referral/diagnosis documentation, measurement and fitting, supplier verification of payer and medical necessity, delivery or pickup, and documentation of patient education on application, wear schedule, and replacement timing.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
LT |