Summary & Overview
HCPCS Level II A4928: Surgical Mask, Pack of 20
HCPCS Level II code A4928 identifies a packaged set of 20 surgical masks commonly used across outpatient and ambulatory care settings. As a supply-item code, A4928 matters nationally for infection control protocols, supply chain reporting, and payer coverage of disposable personal protective equipment. Coverage and payment practices for supplies like surgical masks can affect clinic operating costs, patient safety workflows, and billing compliance.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of the code’s clinical and supply context, typical sites of service, and what to expect in payer coverage and billing practice considerations. The publication also outlines common modifiers and service-line considerations, provides benchmarking guidance where available, and flags areas where input data was not provided.
This resource is intended to help coding and revenue staff, supply chain managers, and policy analysts understand how HCPCS Level II code A4928 is used in clinical settings, and what topics to review for payer submission and documentation.
Billing Code Overview
HCPCS Level II code A4928 describes surgical mask, per 20. This item represents a packaged supply of 20 surgical masks intended for clinical use.
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Service type: Medical/surgical supply
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Typical site of service: Outpatient clinics, ambulatory care centers, physician offices, urgent care centers, and other non-inpatient healthcare settings where disposable protective masks are used.
Clinical & Coding Specifications
Clinical Context
A typical patient scenario involves an outpatient clinic, urgent care, pharmacy, or hospital supply distribution setting providing disposable surgical masks to patients, visitors, or staff for infection control. A patient presenting with mild respiratory symptoms (sore throat, cough, rhinorrhea) or known exposure to an infectious respiratory illness is offered a pack of surgical masks (A4928, surgical mask, per 20) at check‑in or triage. The clinical workflow: triage nurse assesses symptoms and exposure risk, offers source control measures, documents distribution in the medical record, and dispenses the appropriate quantity. The masks may also be supplied to caregivers or visitors entering restricted areas (e.g., oncology, transplant units) where source control is required. Billing is typically performed by the facility or supplier using HCPCS Level II code A4928 to report a unit of 20 disposable surgical masks provided as PPE or source control.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier | Default when no modifier applies to the billed supply |
52 |