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    v1.0.30
    OpenPayerBilling CodesDiagnostic Ultrasound Procedures of the Head and NeckCPT cpt-76516-a-scan-ocular-axial-length-measurement
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    CPT 76516: A-scan Ultrasound Axial Length Measurement

    Medicare pays $33 on average nationally for this procedure.

    CPT code 76516 describes A-scan ultrasound echography of the eye to measure axial length (eyeball size), a diagnostic imaging service typically performed by ophthalmology or optometry providers in an outpatient clinic or ambulatory surgical center setting to assess ocular dimensions for procedures such as intraocular lens calculation and preoperative evaluation.

    For related coverage guidance, see recent payer policy updates: Office-based Laryngeal Procedures, Injectable Dermal Fillers and Bulking Agents (for New Mexico Only), Injectable Dermal Fillers and Bulking Agents (for Kentucky Only).

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    Clinical & Coding Specifications

    Clinical Context

    A 68-year-old patient presents to an ophthalmology clinic for preoperative biometry prior to cataract extraction with intraocular lens (IOL) implantation. The ophthalmic technician or sonographer performs an A-scan ultrasound echography to measure axial length and anterior chamber depth. Measurements are obtained with the patient sitting at the slit-lamp or supine, using topical anesthesia and an immersion or contact probe as indicated. The provider (ophthalmologist or trained technician under physician supervision) reviews the A-scan results, selects the appropriate IOL power calculation formula, documents the axial length and any additional biometric parameters in the medical record, and incorporates the values into surgical planning. Typical sites of service include an ambulatory ophthalmology clinic, outpatient surgery center, or hospital outpatient department. The service is billed when objective ocular axial length measurement is necessary for IOL power calculation, evaluation of axial myopia or hyperopia, or when optical biometry is not possible due to dense cataract or poor fixation.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    76516A-scan ultrasound echography; eye, diagnostic measurement of axial lengthPrimary procedure for axial length measurement used in IOL calculations and axial assessment
    92083Visual field examination (extended) or specialized ophthalmic diagnostic codes are not in input list; excluded per rulesData not available in the input.
    66984Cataract procedure with intraocular lensSurgical procedure commonly planned using axial length measurements obtained with 76516
    92136Ophthalmic ultrasound, diagnostic; B-scan and quantitative A-scan when performed togetherPerformed when posterior segment visualization is needed in addition to axial measurements
    AlphanumericData not available in the input.Data not available in the input.

    Related Modifiers

    8 rows

    ModifierDescriptionWhen to Use
    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…
    59Modifier 59 indicates a distinct procedural service when two procedures that are not normally billed together are clinically and procedurally separate. The CPT definition (as reiterated by CMS)…- Use modifier -59 to report a distinct procedural service when documentation supports that the procedure reported is not normally billed together with another service on the same day because of a…
    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…
    73Modifier 73 indicates a facility-level outpatient hospital or ASC procedure that was discontinued after the patient was prepared and taken to the procedure/operating room but before any anesthesia…- When to use: Apply CPT modifier 73 on the FACILITY (outpatient hospital or ASC) claim when the patient has been fully prepared and physically taken into the procedure/operating room but the…
    78CPT modifier -78 indicates an unplanned, related return to the operating or procedure room by the same provider during the global postoperative period. It is appended when treatment for a…- Use modifier -78 when an unplanned, related complication during the original procedure’s global postoperative period requires the patient to return to a formal operating or procedure room and the…
    50Modifier –50 (Bilateral Procedure) is appended to a CPT code when an identical procedure is performed on paired anatomical structures during the same operative session. The AMA states to add…- Use modifier -50 when the same CPT surgical, diagnostic, or radiology procedure is performed on paired anatomical structures (both sides of the body) during the same operative/session by the same…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    207W00000X
    173C00000X
    261QP2300X
    207K00000X
    208000000X
    314000000X
    207RI0200X
    261QP3300X

    Related ICD-10-CM Codes

    16 rows

    ICD-10-CM CodeDescription
    H21.9Unspecified disorder of iris and ciliary body
    H25.9Unspecified age-related cataract
    H26.9Unspecified cataract
    H35.011Changes in retinal vascular appearance, right eye
    H35.023Exudative retinopathy, bilateral
    H40.10X0Unspecified open-angle glaucoma, stage unspecified
    H40.2230Chronic angle-closure glaucoma, bilateral, stage unspecified
    H46.9Unspecified optic neuritis
    H47.619Cortical blindness, unspecified side of brain
    H52.11Myopia, right eye

    Showing 1–10 of 16

    Related Payer Policy Updates

    Specialty: Otorhinolaryngology (ENT)1 / 2

    10 rows

    PolicyPayerEffective Date
    Office-based Laryngeal ProceduresPremera Bluecross2026-10-06
    Injectable Dermal Fillers and Bulking Agents (for New Mexico Only)UnitedHealthcare2026-10-01
    Injectable Dermal Fillers and Bulking Agents (for Kentucky Only)UnitedHealthcare2026-10-01
    Hearing Aids and Devices Including Wearable, Bone-Anchored, and Semi-Implantable (for Indiana Only)UnitedHealthcare2026-10-01
    Otoacoustic Emissions Testing (for Oxford Only)UnitedHealthcare2026-10-01
    Injectable Dermal Fillers and Bulking AgentsUnitedHealthcare2026-10-01
    Injectable Dermal Fillers and Bulking AgentsUnitedHealthcare2026-10-01
    Sinus Surgeries and Interventions (for North Carolina Only)UnitedHealthcare2026-10-01
    Injectable Dermal Fillers and Bulking Agents (for Nebraska Only)UnitedHealthcare2026-10-01
    Injectable Dermal Fillers and Bulking Agents (for Kansas Only)UnitedHealthcare2026-10-01

    Related Codes

    CPT-76506-ECHOENCEPHALOGRAPHY-INTRACRANIAL-ULTRASOUND

    CPT 76506: Echoencephalography (Cranial Ultrasound)

    CPT-76510-OCULAR-ULTRASOUND-B-SCAN-AND-A-SCAN

    CPT 76510: Ocular B‑scan and Quantitative A‑scan Ultrasound

    CPT-76511-QUANTITATIVE-A-SCAN-OPHTHALMIC-ULTRASOUND

    CPT 76511: Quantitative A‑scan Ultrasound of Intraocular/Orbital Structures

    CPT-76512-B-SCAN-OPHTHALMIC-ULTRASOUND-EYE-ORBIT

    CPT 76512: B‑scan Ultrasound of Intraocular and Orbital Structures

    CPT-76513-IMMERSION-B-SCAN-ANTERIOR-SEGMENT-IMAGING

    CPT 76513: Anterior Segment Imaging with Immersion B-Scan or Biomicroscopy

    CPT-76514-CONTACT-B-SCAN-CORNEAL-THICKNESS-PACHYMETRY

    CPT 76514: Corneal Thickness Measurement by Contact B-Scan

    CPT-76519-A-SCAN-OCULAR-BIOMETRY-IOL-CALCULATION

    CPT 76519: A-scan Ultrasound Axial Length for IOL Calculation

    CPT-76529-OPHTHALMIC-ULTRASOUND-INTRAOCULAR-FOREIGN-BODY-LOCALIZATION

    CPT 76529: Ophthalmic Ultrasound Localization of Intraocular Foreign Body

    CPT-76536-HEAD-NECK-SOFT-TISSUE-ULTRASOUND

    CPT 76536: Ultrasound, Soft Tissues of Head and Neck

    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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