Summary & Overview
HCPCS Q4308: Sanopellis, per square centimeter (add-on, list separately)
HCPCS Level II code Q4308 designates Sanopellis billed per square centimeter as an add-on item reported in addition to a primary procedure. The code captures the use of a topical biologic or adjunct therapeutic product applied over a measured surface area, and it matters nationally as hospitals, clinics, and ambulatory centers adopt new biologic therapies that require clear coding for billing and utilization tracking.
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 context and service setting, an outline of common modifiers associated with the code, and guidance on what information is and is not available in the source input. The publication highlights typical use cases—dermatology, wound care, and ambulatory procedures—where a per-square-centimeter add-on is required alongside a primary procedure.
The analysis provides benchmarks and policy-relevant considerations for payers and providers, including coding practice implications and payer coverage considerations. Where input data is missing, the report states that specific details are not available, ensuring clarity about the limits of the source information. This summary serves as a national reference for clinicians, billing professionals, and policymakers seeking a clear description of HCPCS Level II code Q4308 and its role in coding workflows.
Billing Code Overview
HCPCS Level II code Q4308 represents Sanopellis, billed per square centimeter as an add-on item, reported separately in addition to a primary procedure. This code describes a biologic or therapeutic product (Sanopellis) provided in a quantified unit of surface area and is intended to be reported alongside the primary procedure for which the product augments treatment.
Service Type: Topical biologic/adjunct therapeutic product, per square centimeter
Typical Site of Service: Outpatient clinic or ambulatory procedure setting where the primary procedure is performed (e.g., dermatology, wound care, ambulatory surgery center)
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A 62-year-old patient with a chronic full-thickness diabetic foot ulcer and exposed tendon presents to a wound care clinic. After assessment and failed conservative management (offloading, dressings, local debridement), the multidisciplinary team determines the wound is appropriate for application of a bioengineered skin substitute, Sanopellis, billed per square centimeter as an add-on product to the primary wound procedure. The clinical workflow includes wound measurement and photographic documentation, sharp debridement of nonviable tissue in the procedure room or operating suite, hemostasis, preparation of the wound bed, application of the Sanopellis graft to the measured wound area, securement with appropriate dressings, and post-application instructions for offloading and follow-up visits to assess graft take.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier | When no additional modifier applies to the service |
| 22 | Increased procedural services | When work, time, or intensity substantially exceeds the typical service required for the primary procedure to which this add-on is appended |
| 23 | Unusual anesthesia | When procedure is performed under general anesthesia because local/regional anesthesia is contraindicated |