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    v1.0.28
    OpenPayerBilling CodesProcedures / Professional ServicesHCPCS hcpcs-g6011-complex-multi-field-radiation-therapy-delivery
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    HCPCS G6011: Radiation Treatment Delivery, Multiple Areas

    HCPCS Level II code G6011 describes radiation treatment delivery for three or more separate treatment areas using techniques such as custom blocking, tangential ports, wedges, rotational beams, compensators, and electron beam up to 5 MeV; service type is external beam radiation therapy with complex beam arrangements, and the typical site of service is an outpatient radiation oncology department or hospital radiation therapy suite.

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    Clinical & Coding Specifications

    Clinical Context

    A typical patient is an adult diagnosed with early-stage left-sided breast cancer following breast-conserving surgery (lumpectomy) who requires adjuvant external beam radiation therapy. The radiation oncology clinic schedules a CT simulation to define target volumes and organs at risk. Custom blocking and tangential ports are planned to treat the breast tissue while sparing underlying lung and heart. Wedges and compensators are used to achieve dose homogeneity across the curved chest wall; electron beam may be used for superficial boost fields. A certified radiation therapist delivers daily treatment fractions using photon beams (including rotational beams if indicated) and applies custom blocks and wedges for three or more separate treatment areas (for example, whole breast tangents plus boost and supraclavicular field). Typical visits include setup verification, portal imaging for alignment, and documentation of delivered fractions in the treatment record. Billing for the delivery is reported with G6011 when treatment involves three or more separate treatment areas with custom blocking, tangential ports, wedges, rotational beams, compensators, or electron beam up to 5 MeV. Clinical workflow participants include the radiation oncologist (treatment planning and directives), medical physicist (plan QA and beam modifications), dosimetrist (treatment planning and custom blocking design), radiation therapists (daily delivery and setup), and nursing staff (symptom management).

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    77412Radiation treatment delivery, in the presence of an attending physician, simple/standard treatment techniqueUsed for routine external beam radiation delivery; may be billed for single-field or simple multi-field daily fractions when payer policies differentiate CPT vs HCPCS reporting.
    77336Continuing medical physics consultation, including oversight of treatment delivery, summary and review of patient treatment recordPerformed alongside G6011 when medical physicist provides ongoing QA and oversight of complex deliveries involving custom blocking and compensators.
    77295Therapeutic radiology simulation-aided field setting; complex with custom blocks, custom compensators, or beam modifiersBilled for complex simulation and field setup that precedes treatment delivery reported by G6011.
    77470Special treatment procedures, proton or heavy particle therapy (per course) or brachytherapy source placementListed as related for institutions that provide specialized beam types or boosts; indicates advanced modality coordination with external beam sessions.
    77334Continuity care in radiation therapy management (daily: complex simulation and planning)Reflects management and direction of daily radiation therapy and may be used for treatment management services concurrent with delivery.

    Related Modifiers

    9 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…
    56Modifier ‑56 indicates the reporting provider furnished only the preoperative management for a surgical procedure and did not perform the intraoperative or postoperative care. It is used in…- Use Modifier -56 when a provider performs only the preoperative management in a split‑care situation (one physician manages preop care while a different physician performs the intraoperative…
    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…
    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
    163W00000XRegistered Nurse(1) A registered nurse is a person qualified by graduation from an accredited nursing school (depending upon schooling, a registered nurse may receive…
    2865M2000XMilitary General Acute Care HospitalA Department of Defense (DoD) health care organization furnishing inpatient care 24 hours per day in "fixed" facilities, primarily for DoD beneficiari…
    103TC1900XCounseling PsychologistA psychologist who specializes in general practice and health service. It focuses on how people function both personally and in their relationships at…
    363LP0222XCritical Care Pediatric Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers · Nurse Practitioner
    261QM0850XAdult Mental Health Clinic/CenterAn entity, facility, or distinct part of a facility providing diagnostic, treatment, and prescriptive services related to mental and behavioral disord…
    363LW0102XWomen's Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers · Nurse Practitioner
    207RI0001XClinical & Laboratory Immunology (Internal Medicine) PhysicianAn internal medicine physician who specializes in clinical and laboratory immunology disease management.
    225100000XPhysical TherapistPhysical therapists (PTs) are licensed health care professionals who diagnose and treat individuals of all ages, from newborns to the very oldest, who…

    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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