Summary & Overview
HCPCS Q4111: Gammagraft Per Square Centimeter
HCPCS Level II code Q4111 designates billing for Gammagraft per square centimeter as an add-on supply code used in conjunction with a primary surgical procedure. This code captures area-based charges for graft material used in tissue repair and reconstruction and is relevant for facilities that bill for specialty graft products separately from operative services. Nationally, precise reporting of add-on supply codes like Q4111 affects facility billing accuracy and payment reconciliation for complex surgical cases.
Key payers addressed in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of coding context and clinical use, payer coverage considerations, and benchmarks where available. The publication outlines typical sites of service, common billing modifiers (listed separately), and guidance on how Q4111 is positioned relative to primary procedural codes.
The article provides operationally relevant information: how the code is used in clinical documentation, implications for facility charge capture, and what to expect from major payers and Medicare regarding separate billing of graft materials. Data elements not supplied in the input (for example, payer-specific reimbursement rates, associated taxonomies, and ICD-10 pairings) are noted as not available in the input.
Billing Code Overview
HCPCS Level II code Q4111 represents Gammagraft billed per square centimeter as an add-on procedure that must be listed separately in addition to the primary procedure. The code denotes billing for graft material measured and reported by surface area.
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Service type: Surgical graft material supply for use in wound or tissue repair
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Typical site of service: Hospital outpatient department or ambulatory surgical center where graft placement or reconstruction procedures are performed
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult with a localized soft-tissue defect or chronic wound requiring biological dermal replacement where individualized immunoglobulin-derived graft material (Gammagraft) is applied by a surgical or wound-care team. The procedure is performed as an add-on graft application by a surgeon, plastic surgeon, or wound-care specialist in an outpatient ambulatory surgical center, hospital outpatient department, or specialized wound clinic. The workflow commonly includes pre-procedure assessment (wound measurement and debridement), preparation of the graft material sized per square centimeter and billed with Q4111 as an add-on to the primary repair or reconstruction procedure, sterile application of the graft to the wound bed, securement (sutures, staples, adhesives, or dressings), and post-procedure dressing and wound-care instructions. Typical patient indications include non-healing diabetic foot ulcers, venous stasis ulcers, traumatic skin loss, or surgical defects after tumor excision when biologic grafting is used to promote tissue regeneration and reduce infection risk. Post-application follow-up includes wound checks, dressing changes, and documentation of graft size (cm2) to support billing with Q4111.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
11 | Primary procedure performed |