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    v1.0.30
    OpenPayerBilling CodesAdministrative, Miscellaneous and InvestigationalHCPCS hcpcs-a9900-dme-supply-accessory-service-component
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    HCPCS Level II A9900: Miscellaneous DME Supply or Accessory

    HCPCS Level II code A9900 describes a miscellaneous durable medical equipment (DME) supply, accessory, or service that is considered a component of another HCPCS code; this entry is used for billing incidental or nonlisted DME supplies and related services, typically classified under DME supply/accessory and billed in outpatient, home health, or durable medical equipment supplier settings as an adjunct to primary DME items.

    For related coverage guidance, see recent payer policy updates: Hospital Beds Corporate Medical Policy, Bone Growth Stimulators, Prior Authorization for Durable Medical Equipment (DME).

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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 patient with a complex durable medical equipment (DME) order requires a miscellaneous supply or accessory that does not have a dedicated HCPCS code. Typical scenario: an adult with chronic respiratory failure who uses a home ventilator requires a custom connector kit and replacement tubing component that is not separately coded. The durable medical equipment supplier documents the specific item as A9900 when furnishing the accessory as part of an overall DME delivery. The clinical workflow begins with the ordering clinician (often a pulmonologist or primary care physician) documenting medical necessity on the prescription. The DME supplier verifies the order, confirms measurements or device compatibility, sources the miscellaneous component, and records the item as A9900 on the claim. If the accessory is provided in conjunction with a primary coded DME item, A9900 is billed as a component or service ancillary to that primary HCPCS code. Documentation retained in the patient record includes the physician order, supplier product description, item cost, and reason the accessory lacks a specific HCPCS code, to support medical necessity and payer review.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    94640Pressurized or nonpressurized inhalation treatment for acute airway obstruction or for sputum induction for diagnostic purposesPerformed alongside respiratory DME accessory provision when therapy is initiated or adjusted at the time of supply.
    94002Ventilation assist and management, initiation of pressure or volume preset ventilators for inpatient hospital, initial dayRelated when a patient is started on ventilatory support and ancillary accessories are supplied as part of setup.
    96127Brief emotional/behavioral assessment (e.g., depression inventory)May be used when behavioral assessment influences adherence devices or accessories in home care plans.
    97760Orthotic management and training, initial encounter for use of orthotic(s)Related when orthotic or prosthetic accessories, lacking specific HCPCS codes, are supplied and require training.
    99080Special reports or forms for medical record, other than routine documentation, submitted to third partyUsed when payers require additional documentation to justify an A9900 miscellaneous accessory.

    Related Modifiers

    7 rows

    ModifierDescriptionWhen to Use
    22Modifier –22 (Increased Procedural Services) is used when a reported procedure is substantially more extensive than normally required. The CPT Manual and CMS state it may be appended only when the…- When to use: Append modifier -22 to a procedural CPT code when the service performed is substantially more extensive than the usual service described by that code — i.e., the procedure required…
    26Modifier 26 (Professional Component) identifies and bills only the professional portion of a split service — the physician’s interpretation, report, and medical judgment — when the technical…- Use CPT Modifier -26 when you are billing only the professional component (PC) of a split‑bill eligible service—i.e., you performed the physician interpretation, medical judgment and prepared a…
    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…
    54Modifier ‑54 (“Surgical care only”) is appended to a CPT surgical procedure when the reporting surgeon performs the intraoperative (surgical) component but does not furnish the preoperative and/or…- Use modifier -54 when the reporting surgeon provided only the intraoperative (surgical) component of a procedure and preoperative and/or postoperative management has been or will be provided by…
    55Modifier –55 indicates the billing provider furnished only postoperative management for a procedure that has a global surgical period. According to AAPC, this modifier is appended to the same CPT…- Use modifier -55 when billing the same CPT surgical code that has a 10- or 90-day global period and you, as a provider other than the original surgeon, furnished ONLY postoperative management (no…
    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…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    207R00000X
    207Q00000X
    363L00000X
    207L00000X
    315P00000X
    183700000X
    302R00000X
    2086S0102X

    Related ICD-10-CM Codes

    28 rows

    ICD-10-CM CodeDescription
    E10.621Type 1 diabetes mellitus with foot ulcer
    E11.42Type 2 diabetes mellitus with diabetic polyneuropathy
    E11.621Type 2 diabetes mellitus with foot ulcer
    G60.9Hereditary and idiopathic neuropathy, unspecified
    G62.9Polyneuropathy, unspecified
    M16.11Unilateral primary osteoarthritis, right hip
    M17.11Unilateral primary osteoarthritis, right knee
    M17.12Unilateral primary osteoarthritis, left knee
    M20.11Hallux valgus (acquired), right foot
    M21.41Flat foot [pes planus] (acquired), right foot

    Showing 1–10 of 28

    Related Payer Policy Updates

    Specialty: Durable Medical Equipment (DME)1 / 3

    10 rows

    PolicyPayerEffective Date
    Hospital Beds Corporate Medical Policybcbsvermont2027-01-01
    Bone Growth StimulatorsMass General Brigham Health Plan2026-12-01
    Prior Authorization for Durable Medical Equipment (DME)Blue Cross Blue Shield - Rhode Island2026-12-01
    Patient Liftsuniverahealthcare2026-11-16
    Medical Car SeatsCareSource2026-11-01
    Non-Invasive Home Mechanical Ventilation (E0466)CareSource2026-11-01
    Digestive Enzyme Cartridgeshusky_health2026-11-01
    Hearing Aids and Assistive Listening Devices for Children Enrolled in Birth-to-Threehusky_health2026-11-01
    Home Non-Invasive Positive Pressure Ventilation (NIPPV) Devices for Respiratory Insufficiency and Failureexcellus_health_plan_inc2026-10-15
    Prior Authorization for Durable Medical Equipment (DME)Blue Cross Blue Shield - Rhode Island2026-10-01

    Related Codes

    HCPCS-A9150-NON-PRESCRIPTION-DRUGS

    HCPCS Level II A9150: Non-prescription Drugs

    HCPCS-A9152-SINGLE-ORAL-VITAMIN-MINERAL-DOSE

    HCPCS A9152: Single Oral Vitamin/Mineral/Trace Element

    HCPCS-A9153-MULTIVITAMIN-ORAL-PER-DOSE

    HCPCS A9153: Multiple Vitamins, Oral, Per Dose

    HCPCS-A9154-ARTIFICIAL-SALIVA-1ML

    HCPCS Level II A9154: Artificial saliva, 1 ml

    HCPCS-A9155-ARTIFICIAL-SALIVA-30ML

    HCPCS Level II A9155: Artificial Saliva, 30 mL

    HCPCS-A9156-ORAL-MUCOADHESIVE-PER-1ML

    HCPCS Level II A9156: Oral Mucoadhesive, Per 1 ml

    HCPCS-A9180-PEDICULOSIS-TOPICAL-TREATMENT-PATIENT-ADMINISTRATION

    HCPCS Level II A9180: Pediculosis Topical Treatment for Patient/Caretaker

    HCPCS-A9268-PROGRAMMER-TRANSIENT-INGESTED-CAPSULE

    HCPCS Level II A9268: Programmer for Transient Orally Ingested Capsule

    HCPCS-A9269-PROGRAMMABLE-TRANSIENT-ORAL-CAPSULE

    HCPCS Level II A9269: Programmable Orally Ingested Capsule, Per Month

    HCPCS-A9270-NON-COVERED-ITEM-OR-SERVICE

    HCPCS A9270: Non-covered Item or Service

    Showing 1–10 of 138

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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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