HCPCS Q4224: Human Health Factor 10 Amniotic Patch, Per sq cm

HCPCS Level II code Q4224 identifies the human health factor 10 amniotic patch (hhf10-p), billed per square centimeter as an add-on item reported in addition to a primary procedure. This biologic graft/patch is used as an adjunct in surgical wound repair and tissue regeneration and is nationally relevant due to increased use of biologic materials across multiple surgical specialties and settings. Coverage and coding practices for add-on biologic products can materially affect facility and professional billing workflows and post-procedure charge capture. Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the code's clinical role and service setting, payer coverage considerations, common modifiers used with add-on items, and guidance on where to locate supporting documentation and coding rationale. The publication provides benchmarks for utilization and reimbursement patterns where available, notes policy and coverage variations among major payers, and outlines clinical contexts in which Q4224 is typically reported. Data not available in the input is identified explicitly for missing fields.

Billing Code Overview

HCPCS Level II code Q4224 describes a human health factor 10 amniotic patch (hhf10-p), billed per square centimeter. This is an add-on, list separately item intended to be reported in addition to a primary surgical or procedural code when the hhf10-p product is applied.

Service type: Amniotic membrane graft/patch application (per sq cm), adjunctive surgical material or biologic

Typical site of service: Operative and procedural settings such as hospital operating rooms, ambulatory surgery centers, and other procedural suites where surgical grafts or biologic patches are applied.

Clinical Context

A typical patient is an adult with a non-healing surgical wound, complex soft-tissue defect, or chronic ulceration (for example, a diabetic foot ulcer or venous stasis ulcer) after debridement and preparation of the wound bed. The wound care team (often a surgeon or wound care specialist) performs surgical debridement and assesses tissue viability. After achieving hemostasis and ensuring an appropriate wound bed, an Human Health Factor 10 amniotic patch (Q4224) is measured and applied over the defect to provide biological matrix support and promote healing. The patch is billed per square centimeter as an add-on supply in addition to the primary procedure. Typical workflow steps include wound assessment, cleaning and debridement, sizing and trimming of the amniotic patch to fit the wound, securement of the patch with sutures, adhesive, or secondary dressings, and application of an appropriate dressing and offloading plan. Post-procedure instructions include wound care, follow-up visits for dressing changes and monitoring, and documentation of wound size, preparation, and method of application for billing and clinical continuity. Typical site of service is an outpatient surgical center, hospital outpatient department, wound care clinic, or ambulatory surgery center.

Coding Specifications

Modifier	Description	When to Use
`00`	No modifier.	Use when no modifier applies and billing requires just the base HCPCS code and units.

Taxonomy Code	Specialty	Notes
`208100000X`	General Surgery	Commonly performs debridement and applies biologic wound matrices.
`208000000X`	Emergency Medicine	May apply or initiate application of biologic patches for acute wounds in the ED prior to definitive care.
`208400000X`	Podiatry	Frequently manages diabetic foot ulcers and applies amniotic patches in clinic or OR.
`207P00000X`	Plastic Surgery	Manages complex soft tissue defects and reconstructive uses of amniotic patches.
`207R00000X`	Wound Care Specialist	Focused wound management and application of advanced biologic dressings.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`E11.621`	Type 2 diabetes mellitus with foot ulcer	Diabetic foot ulcers are common indications for amniotic membrane patches to promote healing after debridement.
`L97.421`	Non-pressure chronic ulcer of left ankle with fat layer exposed	Chronic lower-extremity ulcers often receive biologic dressings as adjunctive therapy.
`L97.412`	Non-pressure chronic ulcer of right ankle with fat layer exposed	Same clinical relevance for the contralateral limb.
`I83.019`	Varicose veins of unspecified lower extremity with ulcer, unspecified site	Venous stasis ulcers may be treated with advanced wound matrices after venous management and debridement.
`T81.31XA`	Disruption of wound, not elsewhere classified, initial encounter	Wound dehiscence or disruption can be managed with biologic patches to support tissue repair.
`S81.811A`	Laceration without foreign body of right lower leg, initial encounter	Acute traumatic wounds sometimes receive an amniotic patch as part of tissue reconstruction and healing support.
`Z48.02`	Encounter for removal of sutures	Follow-up codes like suture removal are part of the procedural episode when an amniotic patch was used during closure.
`L89.303`	Pressure ulcer of sacral region, stage 3	Pressure ulcers with partial-thickness loss may be treated with biologic grafts and patches to promote granulation and re-epithelialization.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`11042`	Debridement, subcutaneous tissue (includes epidermis and dermis, if performed); first 20 sq cm or less.	Commonly performed immediately prior to placement of an amniotic patch to prepare a clean wound bed.
`11043`	Debridement, muscle and/or fascia (includes epidermis, dermis, and subcutaneous tissue, if performed); first 20 sq cm or less.	Used for deeper debridement cases where the patch is applied over a surgically prepared deep wound.
`15271`	Application of skin substitute graft to trunk, arms, legs; first 100 sq cm or less.	Represents application of biologic skin substitute products and is often reported when coverage allows in conjunction with amniotic patch supplies.
`15832`	Graft; soft tissue (e.g., fat, dermis) — revision, trunk, arms, legs; first 30 sq cm or less.	May be used for more extensive reconstructive procedures followed by amniotic patch adjunctive use.
`97602`	Removal of devitalized tissue from wound(s), selective debridement, open wound, without anesthesia (e.g., wet-to-dry dressings, enzymatic, etc.); per session, total wound(s) surface area up to 20 sq cm.	Nonoperative debridement sessions frequently precede or follow amniotic patch placement in the outpatient wound clinic.
`99199`	Unlisted anesthesia procedure (used rarely).	Used only if a specific anesthesia code is not available when reporting unusual anesthesia services related to outpatient patch placement.

OpenPayer

Summary & Overview