Summary & Overview
HCPCS Q4258: Enverse, Per Square Centimeter (Add-on)
HCPCS Level II code Q4258 designates billing for Enverse applied and billed per square centimeter as an add-on to a primary procedure. The code matters nationally because it standardizes reporting and reimbursement for area-based topical products used during procedures, affecting facility and professional service line billing for dermatologic, wound care, and minor surgical interventions. Clear coding ensures consistent claim submission and supports appropriate payment for products priced by surface area.
Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise explanation of the code’s clinical context, where it is typically used, and which payers commonly recognize it. The publication also covers common billing considerations, benchmarking approaches, and policy implications relevant to add-on, per-area product codes.
This summary provides benchmarks and payer coverage patterns where available, highlights coding and documentation priorities for accurate charge capture, and outlines how the code integrates with service lines such as outpatient dermatology, wound care, and ambulatory procedure settings. Data not available in the input are noted where applicable.
Billing Code Overview
HCPCS Level II code Q4258 represents the use of Enverse, billed per square centimeter as an add-on, list separately in addition to primary procedure. This code documents a topical or localized treatment product applied and charged based on the area treated.
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Service type: Topical treatment/product applied per square centimeter as an add-on to a primary procedure
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Typical site of service: Outpatient procedure areas, ambulatory surgical centers, clinic treatment rooms where a primary procedure is performed and the product is applied to a localized skin or wound area
Clinical & Coding Specifications
Clinical Context
A patient with a chronic or complex wound presents to an outpatient wound care clinic for adjunctive topical biologic therapy. The clinician evaluates a non-healing lower-extremity ulcer that has failed conservative management (dressings, offloading, debridement) and determines that an allogeneic, cultured dermal product, billed as Q4258 (Enverse, per square centimeter, add-on), will be applied to augment wound closure. The workflow includes wound assessment and measurement, sharp or enzymatic debridement as needed, wound bed preparation, application of the Enverse product sized and billed per square centimeter, fixation with appropriate dressings, and patient instruction for follow-up visits for dressing changes and reassessment. Typical settings include hospital outpatient departments, ambulatory surgery centers, and specialized wound care clinics. The typical patient is an adult with a diabetic foot ulcer, venous stasis ulcer, or surgical wound with delayed healing who requires biologic grafting in addition to standard care.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier | Use when no modifier applies and the service is billed normally |
22 | Increased procedural services | Use when work required is substantially greater than typically required |
52 | Reduced services | Use when the service is partially reduced or not completed |
53 | Discontinued procedure | Use when the procedure is started but halted due to extenuating circumstances |
54 | Surgical care only | Use when another provider bills for postoperative care separately |
55 | Postoperative management only | Use when another provider performed the procedure and this provider manages post-op care |
56 | Preoperative management only | Use when only preoperative care is furnished by the billing provider |
62 | Two surgeons | Use when two surgeons work together as primary surgeons on complex cases |
73 | Discontinued outpatient hospital/ASC procedure prior to anesthesia | Use when outpatient procedure is terminated before administration of anesthesia |
78 | Unplanned return to the operating room by same physician following initial procedure for a related procedure during the postoperative period | Use when reoperation for a related issue occurs during the global period |
| Taxonomy Code | Specialty | Notes |
|---|---|---|
208100000X | Surgery - General | General surgeons provide wound debridement and application of biologic grafts |
207L00000X | Podiatry | Podiatrists commonly manage diabetic foot ulcers and apply graft products |
207P00000X | Vascular Surgery | Vascular surgeons treat ischemic wounds and participate in grafting for limb salvage |
207K00000X | Plastic Surgery | Plastic surgeons perform complex soft tissue reconstruction and graft placement |
261QM0800X | Wound Care/Hyperbaric Medicine | Wound care specialists oversee advanced dressings and biologic applications |
Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
E11.621 | Type 2 diabetes mellitus with foot ulcer | Diabetic foot ulcers are a common indication for biologic grafting to promote wound closure |
I83.013 | Varicose veins of right lower extremity with ulcer of thigh | Venous stasis ulcers often require advanced therapies including dermal products |
L97.421 | Non-pressure chronic ulcer of left heel and midfoot with necrosis of muscle | Chronic non-healing lower-extremity ulcers with tissue loss are appropriate for graft application |
T81.31XA | Disruption of external operation (wound), initial encounter | Surgical wound dehiscence may be treated with adjunctive dermal matrix products |
S81.001A | Open bite of right knee, initial encounter | Traumatic open wounds with soft tissue loss may require biologic scaffolds to facilitate healing |
Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
|---|---|---|
11042 | Debridement, subcutaneous tissue, first 20 sq cm or less | Commonly performed immediately prior to application of an allogeneic dermal product to prepare the wound bed |
11043 | Debridement, muscle and/or fascia, first 20 sq cm or less | Used when deeper debridement is required before graft application |
97602 | Removal of devitalized tissue from wound(s), selective debridement, without anesthesia (eg, high-pressure water jet) | Employed in outpatient settings as part of wound bed preparation before grafting |
15271 | Application of skin substitute graft to trunk, arms, legs; first 100 sq cm or less, or preparation/placement of biologic scaffold | Often performed with or instead of per-square-centimeter billing for biologic materials; CPT codes for skin substitutes relate clinically |
12002 | Simple repair of superficial wounds (other than face), 2.5 cm or less | May be performed in the same encounter for minor adjacent wound closures |