Summary & Overview
HCPCS A6539: Waist-Length Gradient Compression Stocking, 18-30 mmHg
HCPCS Level II code A6539 represents a waist-length gradient compression stocking providing 18–30 mmHg of graduated compression, supplied as a single item. Nationally, compression garments play a key role in conservative management of venous disease, lymphedema, and postoperative vascular care; clear coding supports appropriate coverage and claims processing for durable medical equipment. Major payers examined include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.
Readers will learn what this code denotes clinically and operationally, how it is used across typical outpatient and DME supply settings, and which payers commonly cover such items. The publication outlines benchmarks and reimbursement context where available, summarizes common coverage considerations and documentation expectations, and highlights clinical scenarios in which waist-length 18–30 mmHg stockings are commonly supplied. Data not available in the input for some payer-specific rates and associated ICD-10 diagnoses is noted where applicable.
Billing Code Overview
HCPCS Level II code A6539 describes a gradient compression stocking, waist length, 18-30 mmHg, each. This item is a waist-length graduated compression garment intended to provide 18 to 30 millimeters of mercury (mmHg) pressure, typically used for management of venous insufficiency, lymphedema support, post-thrombotic syndrome, and related circulatory conditions.
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Service type: Durable medical equipment / compression garment
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Typical site of service: Outpatient settings, durable medical equipment suppliers, home use
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult with symptomatic chronic venous insufficiency, varicose veins, or lymphedema who is prescribed a waist-length gradient compression stocking providing 18–30 mmHg of pressure per leg. The patient presents to an outpatient vascular clinic, wound care center, or durable medical equipment (DME) supplier after evaluation by a vascular specialist, primary care clinician, or lymphedema therapist. The clinical workflow includes: a focused history and vascular/lymphedema physical exam, documentation of indication (for example, chronic venous stasis with edema, post-thrombotic syndrome, or lymphedema), measurement of the waist and leg to determine correct stocking size, and prescription of a waist-length 18–30 mmHg stocking. The provider documents medical necessity in the chart, writes or electronically sends a detailed order to the DME supplier specifying A6539 (waist-length gradient compression stocking, 18–30 mmHg, each), and includes diagnosis code(s). The DME supplier verifies payer coverage, applies appropriate modifiers when billing, dispenses the stocking, and provides patient education on donning/doffing and wear schedule. Typical sites of service are outpatient clinic visits and durable medical equipment supplier facilities; the stocking is used in the home by the patient after fitting and instruction.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
LT | Left side | Use when billing a left-leg stocking when laterality is required by payer |
RT | Right side | Use when billing a right-leg stocking when laterality is required by payer |
NU | New equipment | Use when the stocking is initial issue, not a replacement |
RR | Rental | Use if payer requires rental reporting for DME (rare for stockings) |
KX | Requirements met | Use to indicate documentation meets payer-specified criteria for medical necessity |
GA | (not in provided list) | Data not available in the input. |
QX | Ordering/Referring NPI Linkage | Use when the service is provided under a supervising or delegated arrangement requiring the ordering/referring NPI linkage (per payer rules) |
QY | Ordering/Referring OCE | Use when the service is ordered under an originating site/clinical arrangement where ordering practitioner rules apply |
G Y | (not in provided list) | Data not available in the input. |
FY | (per input list) | Use per payer definitions for specific program or funding exceptions when applicable |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
| 261QM0800X | Vascular Surgery | Specialists who evaluate venous disease and prescribe compression therapy |
| 207Q00000X | Physical Medicine & Rehabilitation | Clinicians managing lymphedema and compression therapy programs |
| 207L00000X | Physical Therapy | Therapists who measure, fit, and instruct on compression stockings |
| 3336C0003X | Podiatry | Podiatrists may prescribe and fit compression stockings for lower-extremity conditions |
| 208D00000X | Dermatology | Dermatologists involved in chronic venous stasis ulcers and compression therapy |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
I83.10 | Varicose veins of lower extremity with pain, unspecified leg | Varicose veins commonly cause venous insufficiency and swelling managed with compression stockings |
I87.2 | Venous insufficiency (chronic) (peripheral) | Primary indication for graduated compression stockings to reduce edema and venous hypertension |
I80.9 | Phlebitis and thrombophlebitis of unspecified site | Post-thrombotic symptoms may require compression to control symptoms and prevent recurrence |
I89.0 | Lymphedema, not elsewhere classified | Lymphedema management often includes compression garments such as waist-length stockings |
L97.411 | Non-pressure chronic ulcer of right lower leg limited to breakdown of skin | Compression stockings are part of venous ulcer care to reduce edema and promote healing |
L97.412 | Non-pressure chronic ulcer of left lower leg limited to breakdown of skin | As above, for the opposite side; stocking supports edema control and wound management |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
99213 | Office or other outpatient visit for the evaluation and management of an established patient, typically 15 minutes | Used when the prescribing clinician documents evaluation and writes the order for the compression stocking |
29580 | Application of multi-layer compression system; lower limb | Performed in wound care or lymphedema clinics as part of decongestive therapy; may precede custom or prefabricated stocking use |
97001 | Physical therapy evaluation | Used when physical or occupational therapy evaluates a patient for lymphedema management and determines need for compression stockings |
99401 | Preventive medicine counseling (short) | Used for documented counseling on compression therapy adherence, skin care, and donning techniques |
A9270 | Non-covered item or service (miscellaneous DME supply) | Occasionally used by suppliers when specific HCPCS stocking code billing is not accepted by a payer; documents miscellaneous DME supply |