A6538 Gradient Compression Stocking Reimbursement | OpenPayer

Summary & Overview

HCPCS A6538: Gradient Compression Stocking, Full-Length, ≥40 mmHg

HCPCS Level II code A6538 identifies a full-length or chap-style gradient compression stocking providing 40 mmHg or greater compression, billed per item. High-compression stockings at this level are commonly used for chronic venous insufficiency, post-thrombotic syndrome, lymphedema management, and post-procedural venous care, making the code relevant across outpatient clinics, durable medical equipment suppliers, and home health settings nationwide. This analysis covers national payer handling for major public and commercial payers, including Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise description of clinical context and service type, typical sites of service, and which payers are commonly responsible for coverage decisions. The publication summarizes expected billing practice for a single stocking item, highlights common modifiers associated with durable medical equipment billing, and outlines where to find additional authorization or coverage policy details. Data not available in the input is noted where applicable; benchmarking specifics, procedure pairings, and diagnosis mappings are addressed only when provided. The content is intended to inform billing, compliance, and procurement teams about the code’s purpose, payer landscape, and areas where policy review may be required.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareA6538HCPCS Level IIcompression stockingdurable medical equipmentvenous diseaseoutpatient suppliesmedical billinghome health

Billing Code Overview

HCPCS Level II code A6538 describes a gradient compression stocking, full length/chap style, 40 mmHg or greater, each. This item is a medical compression garment intended to provide therapeutic graduated compression to the lower extremity.

Service type: Durable medical equipment – compression stocking
Typical site of service: Outpatient or home use; supplied through durable medical equipment providers and medical supply retailers

Clinical & Coding Specifications

Clinical Context

A typical patient is a 68-year-old ambulatory female with chronic venous insufficiency and symptomatic varicose veins presenting to a vascular clinic for conservative management. She reports persistent leg heaviness, edema at the end of the day, and aching that improves with elevation. The vascular specialist assesses ankle-brachial index to exclude arterial disease, documents CEAP classification and limb measurements, and determines graduated compression therapy is appropriate. A certified fitter or medical assistant measures limb length and circumference, verifies a 40 mmHg or greater full-length (chap) gradient compression stocking is indicated, and documents fit and patient education on donning/doffing, skin care, and wear schedule. A supply order is generated for A6538 (gradient compression stocking, full length/chap style, 40 mmHg or greater, each). Typical sites of service include outpatient vascular clinics, physician offices, durable medical equipment suppliers, and home health visits when homebound. Follow-up visits document efficacy, skin integrity, and need for replacement or adjustment.

Coding Specifications

Modifier	Description	When to Use
`00`	No modifier	Standard claim submission when no modifier applies

HCPCS A4771: Serum Clotting Time Tube for Dialysis, per 50

HCPCS-A4311-FOLEY-INDWELLING-CATHETER-INSERTION-TRAY-NO-BAG

HCPCS A4311: Insertion Tray for Indwelling Foley Catheter, No Drainage Bag

HCPCS-A7508-TRACHEOSTOMA-HOUSING-INTEGRATED-ADHESIVE

HCPCS A7508: Tracheostoma Housing with Integrated Adhesive

HCPCS-A4318-FEMALE-EXTERNAL-URINARY-COLLECTION-CUP-PER-DAY

HCPCS Level II A4318: Female External Urinary Collection Cup, Per Day

HCPCS-A4627-SPACER-RESERVOIR-METERED-DOSE-INHALER

HCPCS A4627: Spacer or Reservoir for Metered Dose Inhaler

HCPCS-A6520-GRADIENT-COMPRESSION-GLOVE-NIGHTTIME

HCPCS A6520: Gradient Compression Glove, Nighttime Use

HCPCS-A4353-INTERMITTENT-URINARY-CATHETER-WITH-INSERTION-SUPPLIES

HCPCS A4353: Intermittent Urinary Catheter with Insertion Supplies

HCPCS-A5131-APPLIANCE-CLEANER-INCONTINENCE-OSTOMY

HCPCS A5131: Appliance Cleaner for Incontinence and Ostomy Appliances, 16 oz

HCPCS-A4406-PECTIN-OSTOMY-SKIN-BARRIER-PASTE-PER-OUNCE

HCPCS A4406: Pectin-Based Ostomy Skin Barrier Paste, Per Ounce

HCPCS-A4802-PROTAMINE-SULFATE-HEMODIALYSIS-50MG

HCPCS A4802: Protamine Sulfate for Hemodialysis, per 50 mg

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Taxonomy Code	Specialty	Notes
`207L00000X`	Vascular Surgery	Common prescribers for compression therapy in venous disease
`208D00000X`	General Surgery	Surgeons managing venous insufficiency and postoperative compression
`207K00000X`	Cardiovascular Disease	Cardiologists who manage chronic venous disease and prescribe compression
`163W00000X`	Physical Therapy	Physical therapists who may assess fit and provide education on use
`3336C0002X`	Durable Medical Equipment Supplier	Providers who dispense and fit compression stockings

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`I83.90`	Varicose veins of lower extremities with unspecified complications	Varicose veins are a primary indication for graduated compression stockings to reduce symptoms and edema
`I87.2`	Venous insufficiency (chronic) (peripheral)	Chronic venous insufficiency is a common reason to prescribe 40 mmHg or greater compression to manage edema and venous hypertension
`I80.9`	Phlebitis and thrombophlebitis of unspecified site	Post-thrombotic conditions may require compression to reduce swelling and promote venous return
`I82.409`	Acute embolism and thrombosis of unspecified deep veins of lower extremity	DVT and post-thrombotic syndrome considerations influence timing and compression level; documentation needed
`L97.909`	Non-pressure chronic ulcer of unspecified part of lower leg, unspecified severity	Venous leg ulcers often require high-compression stockings after ulcer healing to prevent recurrence

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`93970`	Duplex scan of lower extremity arteries or bypass grafts, bilateral	Arterial hemodynamic assessment to exclude significant peripheral arterial disease prior to high-compression stocking fitting
`93971`	Duplex scan of lower extremity arteries, unilateral or limited study	Unilateral arterial assessment when localized evaluation is needed before prescribing compression
`93975`	Duplex scan of extremity veins, unilateral or limited study	Venous duplex to document reflux or deep vein thrombosis supporting medical necessity for compression stockings
`93965`	Duplex scan of extremity veins, bilateral study	Bilateral venous assessment often performed in venous insufficiency workup before prescribing graduated compression
`99406`	Smoking and tobacco use cessation counseling, intermediate (3-10 minutes)	Counseling often provided during clinic visit addressing risk factors that affect healing and venous disease management
`98960`	Education and training for patient self-management for a chronic condition	Patient education on donning/doffing and skin care related to long-term compression therapy

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