Summary & Overview
HCPCS A2028: Micromatrix Flex, Per mg
HCPCS Level II code A2028 designates Micromatrix flex billed per milligram, representing a micromatrix biomaterial product used as a supply or implant during surgical and interventional procedures. Nationwide, accurate reporting of unit-based supply codes such as A2028 matters for tracking utilization of advanced biomaterials, ensuring consistent claims processing, and informing payment policy for device- and supply-intensive procedures. Key national payers included in this analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare.
Readers will learn the clinical context for A2028, including typical sites of service (ambulatory surgery centers, hospital outpatient departments, and inpatient operating rooms), common scenarios in which a per-milligram micromatrix product would be billed, and the role of precise unit reporting in reimbursement workflows. The publication provides benchmarks where available, summarizes payer coverage patterns, and highlights policy or coding guidance relevant to unit-based HCPCS supplies. Data not available in the input will be identified as such in specific sections.
Billing Code Overview
HCPCS Level II code A2028 describes Micromatrix flex, per mg, a billed supply or implant measured by milligram quantity. Service type: implantable or supplied micromatrix biomaterial intended for use in surgical or interventional procedures where small-unit dosing by weight is required. Typical site of service: ambulatory surgery centers, hospital outpatient departments, and inpatient operating rooms, depending on the clinical procedure and setting.
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Clinical & Coding Specifications
Clinical Context
A typical patient is an adult undergoing treatment requiring a micromatrix flexible dermal or implantable biomaterial provided and billed by weight using HCPCS Level II code A2028 (Micromatrix flex, per mg). The scenario often occurs in outpatient specialty clinics (e.g., dermatology, plastic surgery, wound care) or ambulatory surgical centers where soft tissue reconstruction, dermal augmentation, grafting for chronic wounds, or reconstructive procedures are performed. Clinical workflow: the patient presents with a defect, chronic non-healing wound, or soft-tissue deficiency. The clinician evaluates the defect, documents indication and size, obtains informed consent, prepares the micromatrix product in the sterile field, measures and records the milligram quantity used, and applies or implants the product during the procedure. Billing uses A2028 with the actual milligram amount; clinical documentation must link the product quantity to the procedure note and underlying diagnosis. Typical sites of service include outpatient clinic procedure rooms, ambulatory surgery centers, and hospital outpatient departments. Common patient comorbidities include diabetes mellitus, peripheral vascular disease, prior radiation to the area, or traumatic soft-tissue loss.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services |