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    OpenPayerBilling CodesProcedures / Professional ServicesHCPCS hcpcs-g6012-radiation-treatment-3-or-more-areas-multi-field-6-10mev
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    HCPCS G6012: Radiation Treatment Delivery, 3+ Areas, 6-10 MeV

    HCPCS Level II code G6012 describes radiation treatment delivery directed at three or more separate treatment areas using custom blocking, tangential ports, wedges, rotational beams, compensators, or electron beam techniques at energy levels of 6–10 MeV; the service represents a complex external beam radiation therapy delivery typically provided in an outpatient radiation oncology department or freestanding radiation treatment center.

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    Clinical & Coding Specifications

    Clinical Context

    A typical patient is a 62-year-old woman with locally advanced left-sided breast cancer requiring adjuvant external beam radiation following lumpectomy. The radiation oncology team prescribes a course using multiple beam arrangements including tangential photon fields to the breast, a separate field to the supraclavicular nodal basin, and an electron field to the chest wall scar, with custom cerrobend blocking, wedges, and compensators to achieve dose homogeneity. Treatment energy in the electron field is selected in the 6–10 MeV range. The clinical workflow includes consultation and simulation with CT-based immobilization, generation of custom blocks and beam modifiers by the physics team, treatment planning and physician approval, daily image guidance as appropriate, and delivery of radiation to three or more separate treatment areas in a single session documented as a single treatment delivery event coded with G6012. Typical site of service is an outpatient radiation oncology department within a hospital or freestanding radiation center. Documentation includes indication, simulation images, block and wedge specifications, beam energy, fractions delivered, and any required modifier use for unusual circumstances (e.g., unusual procedural effort, multiple practitioners, or patient-related interruptions).

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    77261Therapeutic radiology simulation-aided field(s) — simplePerformed during CT simulation to define treatment fields prior to planning; used when simple simulation is appropriate before delivery.
    77262Therapeutic radiology simulation-aided field(s) — intermediateUsed for more complex simulation setups (multiple fields, immobilization devices) prior to planning for multi-field treatments like those described by G6012.
    77301Special treatment procedures, design and construction of custom blocks, shields, or compensatorsDocuments the fabrication and dosimetric design work for custom blocking and compensators used in the described treatment delivery.
    77401Radiation therapy management, weekly assessmentRepresents weekly management visits during a course of radiation therapy; accompanies repeated deliveries coded by G6012.
    77295Therapeutic radiology portal verification; simpleUsed for portal imaging or verification of field setup prior to or during the treatment course to ensure correct beam placement.

    Related Modifiers

    8 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…
    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…
    76Modifier -76, Repeat Procedure or Service by Same Physician or Other Qualified Health Care Professional, is appended when the same provider performs an identical, medically necessary procedure or…- Use modifier -76 when the same physician or other qualified health care professional performs an identical procedure or service a second (or subsequent) time on the same date of service and 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…

    Related Provider Taxonomies

    8 rows

    Taxonomy CodeSpecialtyNotes
    207RC0000XCardiovascular Disease PhysicianAn internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threaten…
    208D00000XGeneral Practice PhysicianA physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions.
    175T00000XPeer SpecialistIndividuals certified to perform peer support services through a training process defined by a government agency, such as the Department of Veterans A…
    2084S0010XSports Medicine (Psychiatry & Neurology) PhysicianA psychiatrist or neurologist who specializes in the diagnosis and treatment of sports related conditions and injuries.
    2471M1202XMagnetic Resonance Imaging Radiologic TechnologistA radiologic technologist who specializes in magnetic resonance imaging (MRI) and is appropriately educated and trained, consistent with nationally re…
    207ZC0006XClinical Pathology PhysicianA pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the labora…
    152WL0500XLow Vision Rehabilitation OptometristOptometrists who specialize in low-vision care having training to assess visual function, prescribe low-vision devices, develop treatment plans, and r…
    174H00000XHealth EducatorHealth educators work in a variety of settings providing education to individuals or groups of individuals on healthy behaviors, wellness, and health-…

    Related Codes

    HCPCS-G9490-HOME-ASSESSMENT-NON-HOMEBOUND

    HCPCS G9490: Home Visit Patient Assessment for Non-Homebound Beneficiary

    HCPCS-G0008-INFLUENZA-VACCINE-ADMINISTRATION

    HCPCS G0008: Administration of Influenza Virus Vaccine

    HCPCS-G0009-PNEUMOCOCCAL-VACCINE-ADMINISTRATION

    HCPCS G0009: Administration of Pneumococcal Vaccine

    HCPCS-G0010-HEPATITIS-B-VACCINE-ADMINISTRATION

    HCPCS G0010: Administration of Hepatitis B Vaccine

    HCPCS-G0011-PREP-COUNSELING-HIV-RISK-REDUCTION-ADHERENCE

    HCPCS G0011: Individual PrEP Counseling, HIV Risk Assessment

    HCPCS-G0012-PRE-EXPOSURE-PROPHYLAXIS-INJECTION-HIV-PREVENTION

    HCPCS G0012: Injection of PrEP Drug for HIV Prevention

    HCPCS-G0013-PREP-INDIVIDUAL-COUNSELING-HIV-RISK-REDUCTION

    HCPCS G0013: Individual PrEP Counseling by Clinical Staff

    HCPCS-G0017-PSYCHOTHERAPY-CRISIS-FIRST-60-MINUTES-NON-OFFICE

    HCPCS G0017: Psychotherapy for Crisis, First 60 Minutes

    HCPCS-G0018-PSYCHOTHERAPY-CRISIS-ADDITIONAL-30-MINUTES-NON-OFFICE

    HCPCS G0018: Psychotherapy for Crisis, Additional 30 Minutes

    HCPCS-G0019-COMMUNITY-HEALTH-INTEGRATION-SDOH-CARE-COORDINATION

    HCPCS G0019: Community Health Integration, Person-Centered Assessment

    Showing 1–10 of 1996

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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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