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    v1.0.28
    OpenPayerBilling CodesMedical And Surgical SuppliesHCPCS hcpcs-a4928-surgical-mask-per-20
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    HCPCS Level II A4928: Surgical Mask, Per 20

    HCPCS Level II code A4928 describes a package of surgical masks, per 20, intended for use as disposable personal protective equipment during clinical encounters; the service type is supply of surgical masks and the typical site of service is ambulatory clinic, hospital, or other outpatient care settings where bulk disposable masks are provided to staff or patients.

    For related coverage guidance, see recent payer policy updates: Salivary Hormone Testing, Parathyroid Hormone, Phosphorus, Calcium, and Magnesium Testing, Bone Turnover Markers Testing.

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    Table of contents

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    • Billing CodesCPT, HCPCS, DRG & more
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    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.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    99070Supplies and materials (except spectacles), provided by the physician over and above those usually included with the office visitOften used by providers to report nondurable medical supplies (including masks) furnished during an office visit when payer permits
    99000Handling and/or conveyance of specimen for transfer from the office to a laboratoryMay be billed in encounters where infection control supplies are part of specimen collection workflows
    99401Preventive medicine counseling and/or risk factor reduction intervention(s) provided to an individual; approximately 15 minutesCounseling for infection prevention and mask use may occur alongside supply distribution
    G0438Annual wellness visit, initial; includes a personalized prevention plan of service (PPPS)In visits focused on preventive care, masking and PPE counseling and supplies may be provided
    G0506Care management services for behavioral health conditionsIn integrated care settings, surgical masks may be supplied during clinic visits addressing comorbid conditions

    Related Modifiers

    5 rows

    ModifierDescriptionWhen to Use
    52Modifier ‑52 (Reduced Services) indicates that a service or procedure was partially reduced or omitted at the provider’s discretion, allowing reporting of the basic procedure number with a qualifier…- Use modifier -52 when a physician or qualified health professional electively reduces or omits part of a procedure or service (for example, performing fewer required views or omitting a portion of…
    53Modifier 53 (Discontinued Procedure) signals that a surgical or diagnostic service was begun by the physician but terminated because of extenuating circumstances that threatened the patient’s…- Use modifier -53 when a physician/qualified healthcare professional has started a surgical or diagnostic procedure (e.g., anesthesia administered, incision or scope insertion) and then discontinues…
    62Modifier 62 indicates that two surgeons function as co‑surgeons, each performing distinct parts of the same primary surgical procedure. It is appended to the primary procedure code (and any…- Use modifier -62 when two surgeons act as co‑surgeons (both primary surgeons) on a single definitive primary procedure, each performing distinct parts of the same surgical procedure (append -62 to…
    80CPT® Modifier 80 (Assistant Surgeon) is appended to a surgical CPT code when a physician (MD or DO) provides full, continuous assistance throughout the operative procedure. It is intended only for…- Use CPT Modifier -80 when a physician (MD or DO) serves as an assistant surgeon and provides full, continuous assistance throughout the entire operative procedure; append -80 to the surgical CPT…
    82Modifier 82 is appended to a surgical CPT code to indicate that an attending physician acted as an assistant because a qualified resident surgeon was unavailable. In teaching hospitals it documents…- When to use: Append modifier 82 in teaching-hospital settings to indicate a physician served as an assistant surgeon because a qualified resident surgeon was unavailable (includes situations where…

    Related Provider Taxonomies

    8 rows

    Taxonomy CodeSpecialtyNotes
    207Q00000XFamily Medicine PhysicianFamily Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadt…
    208D00000XGeneral Practice PhysicianA physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions.
    363L00000XNurse Practitioner(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision mak…
    207L00000XAnesthesiology PhysicianAn anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an opera…
    2080P0214XPediatric Pulmonology PhysicianA pediatrician dedicated to the prevention and treatment of all respiratory diseases affecting infants, children and young adults. This specialist is …
    175L00000XHomeopathA provider who is educated and trained in a system of therapeutics in which diseases are treated by drugs which are capable of producing in healthy pe…
    207ZB0001XBlood Banking & Transfusion Medicine PhysicianA physician who specializes in blood banking/transfusion medicine is responsible for the maintenance of an adequate blood supply, blood donor and pati…
    207SC0300XClinical Cytogenetics PhysicianA clinical cytogeneticist demonstrates competence in providing laboratory diagnostic and clinical interpretive services dealing with cellular componen…

    Related ICD-10-CM Codes

    25 rows

    ICD-10-CM CodeDescription
    B34.9Viral infection, unspecified
    B97.89Other viral agents as the cause of diseases classified elsewhere
    F41.9Anxiety disorder, unspecified
    H66.90Otitis media, unspecified, unspecified ear
    J00Acute nasopharyngitis [common cold]
    J02.9Acute pharyngitis, unspecified
    J12.9Viral pneumonia, unspecified
    J18.9Pneumonia, unspecified organism
    J20.9Acute bronchitis, unspecified
    J44.9Chronic obstructive pulmonary disease, unspecified

    Showing 1–10 of 25

    Related Payer Policy Updates

    Specialty: Endocrinology1 / 3

    10 rows

    PolicyPayerEffective Date
    Salivary Hormone TestingOscar Health2026-10-01
    Parathyroid Hormone, Phosphorus, Calcium, and Magnesium TestingOscar Health2026-10-01
    Bone Turnover Markers TestingOscar Health2026-10-01
    Testosterone — Coverage Criteria for Measurement and MonitoringOscar Health2026-10-01
    Diabetes Mellitus Testing — Coverage CriteriaOscar Health2026-10-01
    Thyroid Disease TestingOscar Health2026-10-01
    Thyroid Disease Testingblue cross blue shield - louisiana2026-09-15
    Thyroid Disease TestingBlue Cross Blue Shield - New Mexico2026-09-04
    Parathyroid Hormone, Phosphorous, Calcium and Magnesium TestingBlue Cross Blue Shield - New Mexico2026-09-04
    Testosterone laboratory testing and managementPremera Bluecross2026-09-04

    Related Codes

    HCPCS-A4206-STERILE-SYRINGE-1CC-NEEDLE

    HCPCS A4206: Syringe with Needle, 1 cc or Less, Sterile

    HCPCS-A4207-STERILE-2CC-SYRINGE-WITH-NEEDLE

    HCPCS Level II A4207: Syringe with Needle, Sterile 2 cc

    HCPCS-A4208-STERILE-3CC-SYRINGE-WITH-NEEDLE

    HCPCS Level II A4208: Syringe with Needle, Sterile 3 cc

    HCPCS-A4209-STERILE-SYRINGE-WITH-NEEDLE-5CC-OR-GREATER

    HCPCS Level II A4209: Syringe with Needle, Sterile 5 cc or Greater

    HCPCS-A4210-NEEDLE-FREE-INJECTION-DEVICE

    HCPCS Level II A4210: Needle-free Injection Device, Each

    HCPCS-A4211-SUPPLIES-SELF-ADMINISTERED-INJECTIONS

    HCPCS Level II A4211: Supplies for Self-Administered Injections

    HCPCS-A4212-NON-CORING-NEEDLE-STYLET-CATHETER-ACCESS-SUPPLY

    HCPCS Level II A4212: Non-coring Needle or Stylet with/without Catheter

    HCPCS-A4213-STERILE-SYRINGE-20CC-OR-GREATER

    HCPCS Level II A4213: Syringe, Sterile, 20 cc or Greater, Each

    HCPCS-A4215-STERILE-NEEDLE-SINGLE-EACH

    HCPCS Level II A4215: Needle, Sterile, Any Size

    HCPCS-A4216-STERILE-DILUENT-FLUSH-10ML

    HCPCS Level II A4216: Sterile Diluent/Flush, 10 ml

    Showing 1–10 of 633

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    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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