Q4120 Matristem Burn Matrix Reimbursement | OpenPayer

Summary & Overview

HCPCS Q4120: Matristem Burn Matrix, Per Square Centimeter

HCPCS Level II code Q4120 identifies Matristem burn matrix billed per square centimeter, a biologic extracellular matrix product used in management of burns and complex skin wounds. Nationally, billing for biologic matrices matters because these products carry significant per-unit costs and are used in specialized wound and burn care, affecting hospital outpatient and specialty clinic resource planning.

Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of coverage and coding context across major national payers, typical sites of service where Q4120 is used, and what to expect in claims submission for a per-square-centimeter product. The publication summarizes benchmark considerations for unit-based billing, documentation elements commonly required by payers, and how Q4120 fits into clinical pathways for burn and complex wound management.

This analysis provides national-level context on utilization and billing practice for HCPCS Level II code Q4120, presenting coverage patterns, common administrative requirements, and clinical scenarios in which a Matristem burn matrix is applied. Data not available in the input is clearly noted within sections where applicable.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareQ4120HCPCS Level IImatristemwound careburn matrixbiologic graftoutpatient surgerywound managementprocedure coding

Billing Code Overview

HCPCS Level II code Q4120 represents Matristem burn matrix, per square centimeter, a biologic wound care product used for treatment of burns and other full-thickness or complex skin defects. This product is an extracellular matrix derived from human placental tissue designed to support wound healing and tissue regeneration.

Service type: Application of a biologic wound matrix for burn care and wound reconstruction
Typical site of service: Hospital outpatient departments, burn centers, wound care clinics, and surgical procedure settings where biologic grafts or matrices are applied

Clinical & Coding Specifications

Clinical Context

A 54-year-old patient presents to a wound care clinic with a full-thickness partial-thickness mixed-depth thermal burn to the anterior lower leg after a flash burn. After initial stabilization, debridement, and assessment, the treating physician determines that advanced biologic wound matrix application is appropriate to promote dermal regeneration and reduce scarring. The patient is prepared in a procedure room or outpatient operating suite, the wound bed is cleaned and surgically debrided to remove nonviable tissue, hemostasis is achieved, and a size-matched portion of Matristem burn matrix is applied directly to the wound surface and secured with appropriate dressings. Post-application care includes immobilization as needed, dressing changes at specified intervals, topical infection surveillance, and follow-up visits in the wound care clinic to assess graft take and healing.

Typical site of service: outpatient wound care clinic, ambulatory surgical center, or hospital outpatient department.

Service type: application of an extracellular matrix biologic wound matrix product, billed per square centimeter using Q4120.

Coding Specifications

Modifier	Description	When to Use
`25`	Significant, separately identifiable evaluation and management service by the same physician on the same day of a procedure

HCPCS Q4412: Choriofix, Per Square Centimeter

HCPCS-Q5142-ADALIMUMAB-RYVK-INJECTION-1MG-BIOSIMILAR

HCPCS Q5142: Adalimumab-ryvk injection, 1 mg

HCPCS-Q0507-EXTERNAL-VENTRICULAR-ASSIST-DEVICE-SUPPLY

HCPCS Q0507: Supply or Accessory for External Ventricular Assist Device

HCPCS-Q4392-GRAFIX-DUO-WOUND-MATRIX-PER-CM

HCPCS Q4392: Grafix Duo Wound Matrix, Per Square Centimeter

HCPCS-Q4125-ARTHROFLEX-PER-SQ-CM-ADD-ON

HCPCS Q4125: Arthroflex per Square Centimeter (Add-on)

HCPCS-Q4231-CORPLEX-P-PER-CC

HCPCS Q4231: Corplex p, per cc

HCPCS-Q4394-SURGRAFT-PER-SQUARE-CENTIMETER-ADD-ON

HCPCS Q4394: Surgraft per Square Centimeter, Add-On

HCPCS-Q4020-PEDIATRIC-LONG-ARM-FIBERGLASS-SPLINT-SUPPLY

HCPCS Q4020: Pediatric Long Arm Fiberglass Splint Supplies

HCPCS-Q4111-GAMMAGRAFT-PER-SQ-CM-GRAFT-MATERIAL

HCPCS Q4111: Gammagraft Per Square Centimeter

HCPCS-Q2053-BREXUCABTAGENE-AUTOLEUCEL-CAR-T-CELL-THERAPY

HCPCS Q2053: Brexucabtagene Autoleucel CAR T-Cell Therapy

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Taxonomy Code	Specialty	Notes
`2080S0123X`	Plastic Surgery	Plastic surgeons commonly manage complex burns and apply biologic dermal matrices.
`2086S0105X`	General Surgery	General surgeons with burn or wound care expertise perform debridement and matrix application.
`207W00000X`	Wound Care Specialist	Clinicians focused on wound management frequently apply advanced biologic matrices.
`207L00000X`	Emergency Medicine	Emergency physicians may stabilize burns and coordinate referral for matrix application.
`186000000X`	Dermatology	Dermatologists manage cutaneous wounds and may perform matrix-based reconstructive care.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`T20.201A`	Burn of unspecified degree of right shoulder, initial encounter	Thermal burns requiring advanced wound matrix for dermal regeneration.
`T22.209A`	Burn of unspecified degree of unspecified part of right hand, initial encounter	Hand burns where biologic matrices are used to support healing and function preservation.
`T23.311A`	Burn of third degree of right wrist, initial encounter	Full-thickness burns that may require dermal matrix application to improve healing and reduce scarring.
`T31.1`	Burns involving 10-19% of body surface area (BSA)	Larger surface area burns where per-cm billing of matrix product (`Q4120`) is relevant for coverage and dosing.
`L89.309`	Pressure ulcer of unspecified site, stage 3	Deep wounds and ulcers sometimes treated with biologic matrices to promote granulation and closure.
`S81.821A`	Traumatic amputation of right lower leg, initial encounter	Complex soft-tissue defects from trauma may be managed with biologic matrix products as part of reconstruction.
`A49.9`	Bacterial infection, unspecified	Wounds with superimposed infection require careful management; matrix application may be deferred until infection is controlled.
`Z48.00`	Encounter for change or removal of surgical wound dressing	Relevant to post-application care and dressing management after `Q4120` placement.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`11042`	Debridement, subcutaneous tissue, including epidermis and dermis, first 20 sq cm or less	Often performed immediately prior to `Q4120` application to prepare the wound bed by removing nonviable tissue.
`11043`	Debridement, muscle and/or fascia, first 20 sq cm or less	Used when deeper debridement into muscle/fascia is required before biologic matrix placement.
`15271`	Placement of a biologic skin substitute graft, first 100 sq cm or less; for full-thickness or deep partial-thickness burns	Alternative/replacement technique; may be documented alongside `Q4120` when both product application and procedure-based grafting services are performed.
`16020`	Dressing/bolstering of skin substitute graft; first 50 sq cm or less	Post-application dressing and bolstering performed after matrix placement may be reported with this code when applicable.
`99024`	Postoperative follow-up visit, typically included in the global period (not separately billable when included)	Follow-up wound checks after `Q4120` application are clinically required; billing depends on global period rules and documentation.

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