HCPCS Level II A6533: Gradient Compression Stocking, Thigh Length, 18-30 mmHg

HCPCS Level II code A6533 describes a thigh-length gradient compression stocking with 18–30 mmHg compression, billed per garment; the service represents a durable medical equipment supply intended for compression therapy to manage venous insufficiency, edema, or thrombosis prevention, typically provided in outpatient clinics, pharmacies, home health settings, or durable medical equipment suppliers.

For related coverage guidance, see recent payer policy updates: Salivary Hormone Testing, Bone Turnover Markers Testing, Parathyroid Hormone, Phosphorus, Calcium, and Magnesium Testing.

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HCPCS Level II A6533: Gradient Compression Stocking, Thigh Length, 18-30 mmHg

For related coverage guidance, see recent payer policy updates: Salivary Hormone Testing, Bone Turnover Markers Testing, Parathyroid Hormone, Phosphorus, Calcium, and Magnesium Testing.

Customize your policy alerts

Sign up for hcpcs A6533 policy alerts

Get alerted when payer policies referencing A6533 are released or updated.

Monitor payer policy activity

Receive email alerts as soon as relevant payer policies are published or updated.

Clinical & Coding Specifications

Clinical Context

A typical patient is an adult with symptomatic chronic venous insufficiency or post-thrombotic syndrome presenting to a vascular clinic or durable medical equipment (DME) supplier after evaluation by a vascular medicine specialist, primary care clinician, or wound care team. The clinician documents indications such as lower-extremity edema, varicose veins with pain or heaviness, venous stasis dermatitis, or a healed/slow-healing venous ulcer. A prescription for a single thigh‑length gradient compression stocking, 18-30 mmHg, is written specifying laterality if needed. The DME supplier measures the patient’s limb circumference and length to ensure proper fit, dispenses one stocking per the order (billing unit: each), and provides patient education on wear schedule, donning/doffing techniques, laundering, and replacement timing. Typical sites of service include outpatient vascular clinics, physician offices, wound care centers, and DME supplier locations. Prior to delivery, the supplier may verify coverage and obtain prior authorization from payors such as Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthCare, BUCA, or Medicare when required.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`99213`	Office or other outpatient visit for evaluation and management of an established patient, typically 15 minutes	Used when the clinician evaluates venous symptoms and documents medical necessity for compression stocking prior to prescription.
`29580`	Application of multi-layer compression system (e.g., for venous stasis ulcer), per limb	May be performed in wound care settings before or alongside compression stocking use for active ulcer management.
`36478`	Endovenous thermal ablation of incompetent vein, extremity, single vein, percutaneous	A definitive venous intervention that may be done in patients with venous insufficiency who also use compression stockings pre- or post-procedure.
`93971`	Duplex scan of extremity veins (non-invasive) complete bilateral study	Used to document venous reflux or thrombosis that supports the medical necessity for graded compression stockings.
`97597`	Removal of devitalized tissue (debridement), first 20 sq cm or less	Wound care procedure that can occur in conjunction with compression therapy for venous ulcers.

Related Modifiers

5 rows

Modifier	Description	When to Use
52	Modifier ‑52 (Reduced Services) indicates that a service or procedure was partially reduced or omitted at the provider’s discretion, allowing reporting of the basic procedure number with a qualifier…	- Use modifier -52 when a physician or qualified health professional electively reduces or omits part of a procedure or service (for example, performing fewer required views or omitting a portion of…
P3	Modifier P3 denotes that the anesthesia patient has severe systemic disease (ASA III). It applies only to anesthesia CPT codes (00100–01999) and must be appended by the anesthesia provider with…	- Applies only to anesthesia procedure codes (CPT 00100–01999) and should be appended by the anesthesia provider when the patient meets the definition of "severe systemic disease" (CPT/AAPC P3;…
1P	Modifier 1P is a Category II performance measure exclusion modifier used to indicate that a patient’s medical condition prevented performance of the action specified by a Category II quality measure…	- Use modifier 1P only with Category II (quality reporting) codes when the specific measure’s reporting instructions explicitly allow a medical-reason exclusion; it marks the patient as medically…
54	Modifier ‑54 (“Surgical care only”) is appended to a CPT surgical procedure when the reporting surgeon performs the intraoperative (surgical) component but does not furnish the preoperative and/or…	- Use modifier -54 when the reporting surgeon provided only the intraoperative (surgical) component of a procedure and preoperative and/or postoperative management has been or will be provided by…
91	Modifier 91 — “Repeat Clinical Diagnostic Laboratory Test” — is appended when the exact same CPT laboratory test is performed more than once for the same patient on the same day because serial,…	- Use modifier 91 when the exact same CPT laboratory test is performed more than once on the same patient on the same date because serial or repeated testing is medically necessary to monitor…

Related Provider Taxonomies

8 rows

Taxonomy Code	Specialty	Notes
207RC0000X	Cardiovascular Disease Physician	An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threaten…
208VP0000X	Pain Medicine Physician	Pain Medicine is a primary medical specialty based on a distinct body of knowledge and a well-defined scope of clinical practice that is founded on sc…
261QP2400X	Prison Health Clinic/Center	Ambulatory Health Care Facilities · Clinic/Center
207K00000X	Allergy & Immunology Physician	An allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Select…
2080P0202X	Pediatric Cardiology Physician	A pediatric cardiologist provides comprehensive care to patients with cardiovascular problems. This specialist is skilled in selecting, performing and…
164X00000X	Licensed Vocational Nurse	An individual with post-high school vocational training and practical experience in the provision of nursing care at a level less than that required f…
152WP0200X	Pediatric Optometrist	Optometrists who work in Pediatrics are concerned with the prevention, development, diagnosis, and treatment of visual problems in children.
225500000X	Respiratory/Developmental/Rehabilitative Specialist/Technologist	General classification identifying individuals who are trained on a specific piece of equipment or technical procedure.

Related ICD-10-CM Codes

22 rows

ICD-10-CM Code	Description
E11.51	Type 2 diabetes mellitus with diabetic peripheral angiopathy without gangrene
I74.3	Embolism and thrombosis of arteries of the lower extremities
I80.209	Phlebitis and thrombophlebitis of unspecified deep vessels of unspecified lower extremity
I80.9	Phlebitis and thrombophlebitis of unspecified site
I83.10	Varicose veins of unspecified lower extremity with inflammation
I83.90	Asymptomatic varicose veins of unspecified lower extremity
I87.1	Compression of vein
I87.2	Venous insufficiency (chronic) (peripheral)
I89.0	Lymphedema, not elsewhere classified
I95.1	Orthostatic hypotension

Showing 1–10 of 22

Related Payer Policy Updates

Specialty: Endocrinology1 / 3

10 rows

Policy	Payer	Effective Date
Salivary Hormone Testing	Oscar Health	2026-10-01
Bone Turnover Markers Testing	Oscar Health	2026-10-01
Parathyroid Hormone, Phosphorus, Calcium, and Magnesium Testing	Oscar Health	2026-10-01
Testosterone — Coverage Criteria for Measurement and Monitoring	Oscar Health	2026-10-01
Thyroid Disease Testing	Oscar Health	2026-10-01
Diabetes Mellitus Testing — Coverage Criteria	Oscar Health	2026-10-01
Thyroid Disease Testing	blue cross blue shield - louisiana	2026-09-15
Thyroid Disease Testing	Blue Cross Blue Shield - New Mexico	2026-09-04
Parathyroid Hormone, Phosphorous, Calcium and Magnesium Testing	Blue Cross Blue Shield - New Mexico	2026-09-04
Testosterone laboratory testing and management	Premera Bluecross	2026-09-04

Related Codes

HCPCS-A4206-STERILE-SYRINGE-1CC-NEEDLE

HCPCS A4206: Syringe with Needle, 1 cc or Less, Sterile

HCPCS-A4207-STERILE-2CC-SYRINGE-WITH-NEEDLE

HCPCS Level II A4207: Syringe with Needle, Sterile 2 cc

HCPCS-A4208-STERILE-3CC-SYRINGE-WITH-NEEDLE

HCPCS Level II A4208: Syringe with Needle, Sterile 3 cc

HCPCS-A4209-STERILE-SYRINGE-WITH-NEEDLE-5CC-OR-GREATER

HCPCS Level II A4209: Syringe with Needle, Sterile 5 cc or Greater

HCPCS-A4210-NEEDLE-FREE-INJECTION-DEVICE

HCPCS Level II A4210: Needle-free Injection Device, Each

HCPCS-A4211-SUPPLIES-SELF-ADMINISTERED-INJECTIONS

HCPCS Level II A4211: Supplies for Self-Administered Injections

HCPCS-A4212-NON-CORING-NEEDLE-STYLET-CATHETER-ACCESS-SUPPLY

HCPCS Level II A4212: Non-coring Needle or Stylet with/without Catheter

HCPCS-A4213-STERILE-SYRINGE-20CC-OR-GREATER

HCPCS Level II A4213: Syringe, Sterile, 20 cc or Greater, Each

HCPCS-A4215-STERILE-NEEDLE-SINGLE-EACH

HCPCS Level II A4215: Needle, Sterile, Any Size

HCPCS-A4216-STERILE-DILUENT-FLUSH-10ML

HCPCS Level II A4216: Sterile Diluent/Flush, 10 ml

Showing 1–10 of 633

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

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Clinical & Coding Specifications

Clinical Context

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`99213`	Office or other outpatient visit for evaluation and management of an established patient, typically 15 minutes	Used when the clinician evaluates venous symptoms and documents medical necessity for compression stocking prior to prescription.
`29580`	Application of multi-layer compression system (e.g., for venous stasis ulcer), per limb	May be performed in wound care settings before or alongside compression stocking use for active ulcer management.
`36478`	Endovenous thermal ablation of incompetent vein, extremity, single vein, percutaneous	A definitive venous intervention that may be done in patients with venous insufficiency who also use compression stockings pre- or post-procedure.
`93971`	Duplex scan of extremity veins (non-invasive) complete bilateral study	Used to document venous reflux or thrombosis that supports the medical necessity for graded compression stockings.
`97597`	Removal of devitalized tissue (debridement), first 20 sq cm or less	Wound care procedure that can occur in conjunction with compression therapy for venous ulcers.

Related Modifiers

5 rows

Modifier	Description	When to Use
52	Modifier ‑52 (Reduced Services) indicates that a service or procedure was partially reduced or omitted at the provider’s discretion, allowing reporting of the basic procedure number with a qualifier…	- Use modifier -52 when a physician or qualified health professional electively reduces or omits part of a procedure or service (for example, performing fewer required views or omitting a portion of…
P3	Modifier P3 denotes that the anesthesia patient has severe systemic disease (ASA III). It applies only to anesthesia CPT codes (00100–01999) and must be appended by the anesthesia provider with…	- Applies only to anesthesia procedure codes (CPT 00100–01999) and should be appended by the anesthesia provider when the patient meets the definition of "severe systemic disease" (CPT/AAPC P3;…
1P	Modifier 1P is a Category II performance measure exclusion modifier used to indicate that a patient’s medical condition prevented performance of the action specified by a Category II quality measure…	- Use modifier 1P only with Category II (quality reporting) codes when the specific measure’s reporting instructions explicitly allow a medical-reason exclusion; it marks the patient as medically…
54	Modifier ‑54 (“Surgical care only”) is appended to a CPT surgical procedure when the reporting surgeon performs the intraoperative (surgical) component but does not furnish the preoperative and/or…	- Use modifier -54 when the reporting surgeon provided only the intraoperative (surgical) component of a procedure and preoperative and/or postoperative management has been or will be provided by…
91	Modifier 91 — “Repeat Clinical Diagnostic Laboratory Test” — is appended when the exact same CPT laboratory test is performed more than once for the same patient on the same day because serial,…	- Use modifier 91 when the exact same CPT laboratory test is performed more than once on the same patient on the same date because serial or repeated testing is medically necessary to monitor…

Related Provider Taxonomies

8 rows

Taxonomy Code	Specialty	Notes
207RC0000X	Cardiovascular Disease Physician	An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threaten…
208VP0000X	Pain Medicine Physician	Pain Medicine is a primary medical specialty based on a distinct body of knowledge and a well-defined scope of clinical practice that is founded on sc…
261QP2400X	Prison Health Clinic/Center	Ambulatory Health Care Facilities · Clinic/Center
207K00000X	Allergy & Immunology Physician	An allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Select…
2080P0202X	Pediatric Cardiology Physician	A pediatric cardiologist provides comprehensive care to patients with cardiovascular problems. This specialist is skilled in selecting, performing and…
164X00000X	Licensed Vocational Nurse	An individual with post-high school vocational training and practical experience in the provision of nursing care at a level less than that required f…
152WP0200X	Pediatric Optometrist	Optometrists who work in Pediatrics are concerned with the prevention, development, diagnosis, and treatment of visual problems in children.
225500000X	Respiratory/Developmental/Rehabilitative Specialist/Technologist	General classification identifying individuals who are trained on a specific piece of equipment or technical procedure.

Related ICD-10-CM Codes

22 rows

ICD-10-CM Code	Description
E11.51	Type 2 diabetes mellitus with diabetic peripheral angiopathy without gangrene
I74.3	Embolism and thrombosis of arteries of the lower extremities
I80.209	Phlebitis and thrombophlebitis of unspecified deep vessels of unspecified lower extremity
I80.9	Phlebitis and thrombophlebitis of unspecified site
I83.10	Varicose veins of unspecified lower extremity with inflammation
I83.90	Asymptomatic varicose veins of unspecified lower extremity
I87.1	Compression of vein
I87.2	Venous insufficiency (chronic) (peripheral)
I89.0	Lymphedema, not elsewhere classified
I95.1	Orthostatic hypotension

Showing 1–10 of 22

Related Payer Policy Updates

Specialty: Endocrinology1 / 3

10 rows

Policy	Payer	Effective Date
Salivary Hormone Testing	Oscar Health	2026-10-01
Bone Turnover Markers Testing	Oscar Health	2026-10-01
Parathyroid Hormone, Phosphorus, Calcium, and Magnesium Testing	Oscar Health	2026-10-01
Testosterone — Coverage Criteria for Measurement and Monitoring	Oscar Health	2026-10-01
Thyroid Disease Testing	Oscar Health	2026-10-01
Diabetes Mellitus Testing — Coverage Criteria	Oscar Health	2026-10-01
Thyroid Disease Testing	blue cross blue shield - louisiana	2026-09-15
Thyroid Disease Testing	Blue Cross Blue Shield - New Mexico	2026-09-04
Parathyroid Hormone, Phosphorous, Calcium and Magnesium Testing	Blue Cross Blue Shield - New Mexico	2026-09-04
Testosterone laboratory testing and management	Premera Bluecross	2026-09-04

Related Codes

HCPCS-A4206-STERILE-SYRINGE-1CC-NEEDLE

HCPCS A4206: Syringe with Needle, 1 cc or Less, Sterile

HCPCS-A4207-STERILE-2CC-SYRINGE-WITH-NEEDLE

HCPCS Level II A4207: Syringe with Needle, Sterile 2 cc

HCPCS-A4208-STERILE-3CC-SYRINGE-WITH-NEEDLE

HCPCS Level II A4208: Syringe with Needle, Sterile 3 cc

HCPCS-A4209-STERILE-SYRINGE-WITH-NEEDLE-5CC-OR-GREATER

HCPCS Level II A4209: Syringe with Needle, Sterile 5 cc or Greater

HCPCS-A4210-NEEDLE-FREE-INJECTION-DEVICE

HCPCS Level II A4210: Needle-free Injection Device, Each

HCPCS-A4211-SUPPLIES-SELF-ADMINISTERED-INJECTIONS

HCPCS Level II A4211: Supplies for Self-Administered Injections

HCPCS-A4212-NON-CORING-NEEDLE-STYLET-CATHETER-ACCESS-SUPPLY

HCPCS Level II A4212: Non-coring Needle or Stylet with/without Catheter

HCPCS-A4213-STERILE-SYRINGE-20CC-OR-GREATER

HCPCS Level II A4213: Syringe, Sterile, 20 cc or Greater, Each

HCPCS-A4215-STERILE-NEEDLE-SINGLE-EACH

HCPCS Level II A4215: Needle, Sterile, Any Size

HCPCS-A4216-STERILE-DILUENT-FLUSH-10ML

HCPCS Level II A4216: Sterile Diluent/Flush, 10 ml

Showing 1–10 of 633

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

HCPCS Level II A6533: Gradient Compression Stocking, Thigh Length, 18-30 mmHg

Sign up for hcpcs A6533 policy alerts

HCPCS Level II A6533: Gradient Compression Stocking, Thigh Length, 18-30 mmHg

Sign up for hcpcs A6533 policy alerts

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related ICD-10-CM Codes

Related Payer Policy Updates

Related Codes

What does HCPCS A6533 describe and when is it used?

What clinical documentation supports billing for A6533?

What are the supplier’s responsibilities when providing an A6533 stocking?

Which related CPT codes are commonly associated with A6533?

Which payors commonly cover A6533 and is prior authorization required?

References

Clinical & Coding Specifications

Clinical Context

Related CPT Codes

Related Modifiers

Related Provider Taxonomies

Related ICD-10-CM Codes

Related Payer Policy Updates

Related Codes

What does HCPCS A6533 describe and when is it used?

What clinical documentation supports billing for A6533?

What are the supplier’s responsibilities when providing an A6533 stocking?

Which related CPT codes are commonly associated with A6533?

Which payors commonly cover A6533 and is prior authorization required?

References