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    v1.0.28
    OpenPayerBilling CodesDurable Medical EquipmentHCPCS hcpcs-e2599-speech-generating-device-accessory-noc
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    HCPCS Level II E2599: Accessory for Speech Generating Device, NOC

    HCPCS Level II code E2599 designates an accessory for a speech generating device, not otherwise classified, representing miscellaneous or uncommon augmentative and alternative communication (AAC) device accessories used to support speech-generating devices; the service type is device accessory/supply and the typical site of service is outpatient clinics, durable medical equipment suppliers, or patient home use.

    For related coverage guidance, see recent payer policy updates: Interferential Stimulation Devices (for home use), Prior Authorization for Durable Medical Equipment (DME), Breast Pumps.

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    Clinical & Coding Specifications

    Clinical Context

    A patient with a speech-generating device (SGD) needs a replacement or additional accessory that is not specifically listed in existing HCPCS codes. Typical patients include children or adults with congenital or acquired communication disorders (e.g., cerebral palsy, traumatic brain injury, amyotrophic lateral sclerosis) who rely on an SGD for expressive communication. The clinical workflow begins with an evaluation by a speech-language pathologist (SLP) or interdisciplinary assistive technology team to identify an accessory need (for example, a specialized mounting bracket, stylus, protective case with custom fittings, or custom switch interface). The team documents functional goals, device compatibility, and justification for the accessory as medically necessary to enable effective use of the SGD. A prescription or order is generated that references E2599 for an accessory for a speech generating device, not otherwise classified. Durable medical equipment (DME) supplier and manufacturer specifications, photos, and an itemized invoice are attached to the claim. The accessory is provided in clinic or delivered to the patient’s residence; training on use is typically provided by the SLP or DME vendor. Follow-up visits assess fit, durability, and whether further adjustments or upgrades are required. Payers commonly require proof of medical necessity, prior authorization, and documentation linking the accessory to improved communication function or safety.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    92507Treatment of speech, language, voice, communication, and/or auditory processing disorder; individualSLP evaluation and direct therapy often performed before or after accessory fitting to document functional need and training.
    92601Evaluation of speech, language, voice, communication, and/or auditory processing; identification of communication function by non-standardized meansInitial communication assessment to determine need for SGD accessories and to justify E2599.
    97763Orthotic management and training, upper extremity, lower extremity, and/or trunk, initial encounterUsed when occupational therapy provides hands-on training for positioning or use of custom mounting systems and accessories.
    99070Supplies and materials (except spectacles), provided by provider over and above those usually included with the office visit or procedureUsed when small accessories, consumables, or custom materials are supplied by the clinic in addition to standard device components.
    99080Additional documentation and/or medical records, when requested by a third partyUsed when payers (for example, Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, BUCA, Medicare) request supplemental documentation to support medical necessity for E2599.

    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…
    23Modifier -23 (Unusual Anesthesia) is used on anesthesia service CPT codes when a procedure that normally requires no anesthesia or only local anesthesia must be performed under general anesthesia…- Use modifier -23 only on anesthesia CPT codes (00100–01999) when a procedure that normally requires no anesthesia or only local anesthesia must be performed under general anesthesia because of…
    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 CodeSpecialtyNotes
    332B00000XDurable Medical Equipment & Medical SuppliesA supplier of medical equipment such as respirators, wheelchairs, home dialysis systems, or monitoring systems, that are prescribed by a physician for…
    261Q00000XClinic/CenterA facility or distinct part of one used for the diagnosis and treatment of outpatients. "Clinic/Center" is irregularly defined, sometimes being limite…
    208000000XPediatrics PhysicianA pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectru…
    2084P0800XPsychiatry PhysicianA Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, …
    1710I1002XIndependent Duty CorpsmanA Navy Independent Duty Corpsman (IDC) is an active duty Sailor who has successfully completed one of the Navy's specific IDC training programs. IDCs…
    106E00000XAssistant Behavior AnalystAn assistant behavior analyst is qualified by Behavior Analyst Certification Board certification and/or a state-issued license or credential in behavi…
    152WV0400XVision Therapy OptometristOptometrists who specialize in vision therapy as a treatment process used to improve vision function. It includes a broad range of developmental and r…
    322D00000XEmotionally Disturbed Childrens' Residential Treatment FacilityA residential facility that provides habilitation services and other care and treatment to children diagnosed with mental health illness, behavioral i…

    Related Payer Policy Updates

    Specialty: Durable Medical Equipment (DME)1 / 3

    10 rows

    PolicyPayerEffective Date
    Interferential Stimulation Devices (for home use)Moda Health2026-10-01
    Prior Authorization for Durable Medical Equipment (DME)Blue Cross Blue Shield - Rhode Island2026-10-01
    Breast PumpsModa Health2026-09-01
    Personal Emergency Response SystemsCareSource Georgia2026-09-01
    Continuous Passive Motion (CPM) DevicesCigna2026-08-15
    Push-Rim Activated Power-Assist Device (E0986) — Manual Wheelchair Accessorymoda_health_plan_inc2026-08-13
    Beds and Mattresses (for Ohio Only)Colorado Rocky Mountain Health Plans2026-08-01
    Beds and Mattresses (for Kentucky Only)UnitedHealthcare2026-08-01
    Pneumatic Compression Devices (for Nebraska Only)UnitedHealthcare2026-08-01
    Indications for Coverage — Hospital beds, support surfaces, and safety enclosure beds (DME)Colorado Rocky Mountain Health Plans2026-08-01

    Related Codes

    HCPCS-E0100-CANE-DURABLE-MEDICAL-EQUIPMENT-AMBULATION

    HCPCS E0100: Cane, Adjustable or Fixed, With Tip

    HCPCS-E0105-CANE-QUAD-THREE-PRONG-MOBILITY-AID

    HCPCS Level II E0105: Cane, Quad or Three-Prong, Includes Tips

    HCPCS-E0110-FOREARM-CRUTCHES-PAIR-DME-MOBILITY

    HCPCS Level II E0110: Forearm Crutches, Pair, Complete with Tips and Handgrips

    HCPCS-E0111-CRUTCH-FOREARM-DURABLE-MEDICAL-EQUIPMENT

    HCPCS Level II E0111: Crutch, Forearm, With Tip and Handgrips

    HCPCS-E0112-UNDERARM-WOOD-CRUTCHES-PAIR

    HCPCS Level II E0112: Underarm Wooden Crutches, Pair

    HCPCS-E0113-CRUTCH-UNDERARM-WOOD-ADJUSTABLE-FIXED-WITH-PAD-TIP-HANDGRIP

    HCPCS Level II E0113: Crutch Underarm, Wood, Adjustable or Fixed

    HCPCS-E0114-UNDERARM-CRUTCHES-PAIR-ADJUSTABLE-FIXED

    HCPCS Level II E0114: Underarm (Axillary) Crutches, Adjustable or Fixed, Pair

    HCPCS-E0116-UNDERARM-CRUTCH-NON-WOOD-ADJUSTABLE-FIXED

    HCPCS E0116: Underarm Crutch, Non-Wood, Adjustable/Fixed with Pad

    HCPCS-E0117-ARTICULATING-SPRING-ASSISTED-UNDERARM-CRUTCH

    HCPCS Level II E0117: Crutch, Underarm, Articulating, Spring-Assisted

    HCPCS-E0118-LOWER-LEG-PLATFORM-CRUTCH-SUBSTITUTE

    HCPCS E0118: Crutch Substitute, Lower Leg Platform

    Showing 1–10 of 670

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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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