Summary & Overview
HCPCS Level II A6610: Below-Knee Custom Gradient Compression Stocking
HCPCS Level II code A6610 represents a custom, below-knee gradient compression stocking rated at 18–30 mmHg. These custom-fitted compression garments are used to manage venous insufficiency, edema, and related lower-extremity conditions and are supplied through outpatient clinics, clinician offices, or durable medical equipment suppliers. Nationally, custom compression stockings matter because they can reduce complications from chronic venous disease, impact durable medical equipment spending, and require precise documentation for medical necessity.
Key payers included in this analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context for A6610, common payer coverage considerations, and the types of benchmarks and policy details typically reviewed for durable medical equipment and custom orthotic/garment supply. The publication provides actionable reference material on coding and billing practice patterns, documentation expectations, and typical sites of service where custom compression stockings are assessed and dispensed. Data not available in the input will be noted where relevant.
Billing Code Overview
HCPCS Level II code A6610 describes a gradient compression stocking, below knee, 18-30 mmHg, custom, each. This item is a custom-fitted medical compression stocking designed to provide graduated pressure (18–30 millimeters of mercury) to the lower leg and ankle to support venous return and reduce edema or venous insufficiency symptoms.
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Service type: Durable medical equipment / custom compression garment
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Typical site of service: Outpatient clinic, durable medical equipment supplier, or clinician office where custom fittings and measurements are performed
Clinical & Coding Specifications
Clinical Context
A 68-year-old patient with chronic venous insufficiency and persistent lower-extremity edema is evaluated in an outpatient vascular clinic. The vascular specialist documents symptoms of leg heaviness, aching and visible varicosities with pitting edema on exam. Conservative measures (leg elevation, exercise) have been insufficient and the clinician prescribes a custom, below-knee gradient compression stocking with 18–30 mmHg compression to improve venous return, reduce edema, and prevent venous ulcer recurrence.
The typical workflow: the clinician documents medical necessity and measures the limb for a custom fit; the order for A6610 is placed with the supplier; the supplier creates the custom stocking and bills per unit (each). A follow-up visit evaluates fit, skin integrity, and symptomatic response. Documentation includes diagnosis linking, measurement records, supplier invoice, and any modifier(s) required for billing (for example left or right when supplied unilaterally). Typical site of service is outpatient clinic or durable medical equipment supplier with the product dispensed in an outpatient setting or retail medical supply location.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
LT | Left side | When the custom stocking is provided only for the left lower extremity |