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    OpenPayerBilling CodesProcedures / Professional ServicesHCPCS hcpcs-g6002-stereoscopic-x-ray-guidance-radiation-therapy-localization
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    HCPCS G6002: Stereoscopic X-ray Guidance for Radiation Therapy Localization

    HCPCS Level II code G6002 describes stereoscopic x-ray guidance used to localize the target volume for delivery of radiation therapy; this is an imaging guidance service associated with radiation therapy planning and delivery and is typically performed in an outpatient radiation oncology or hospital-based radiation therapy suite.

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    Table of contents

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    Clinical & Coding Specifications

    Clinical Context

    A 64-year-old patient with a newly diagnosed left parotid gland squamous cell carcinoma is scheduled for external beam radiation therapy. Prior to treatment planning, the radiation oncology team performs stereoscopic x-ray localization to precisely define the target volume and confirm daily patient setup using implanted fiducial markers and external immobilization devices. The workflow includes patient registration, placement and verification of immobilization (thermoplastic mask), acquisition of stereoscopic kV radiographs in two oblique angles, comparison to reference digitally reconstructed radiographs (DRRs) from the CT-based treatment plan, and application of table shifts or couch corrections to align the target within tolerance before each fraction. Documentation includes the imaging performed, comparisons to reference images, measured shifts, any repeat imaging, and the operator and interpreting physician. This service is billed when stereoscopic x-ray guidance is used specifically to localize the target volume for delivery of radiation therapy and can be provided in the radiation oncology department, affiliated outpatient imaging suite, or hospital-based radiotherapy center.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    77290Therapeutic radiology simulation-aided localization; simplePerformed prior to stereoscopic localization as simulation for treatment planning; stereoscopic x-ray guidance may be used during or after simulation to verify setup.
    77300Therapeutic radiology port film(s)/portal imaging (single or multiple)Portal imaging or verification imaging is commonly performed alongside stereoscopic localization for daily treatment verification.
    77336Radiation treatment management, includes complex treatment devices, review and interpretation of image-guided radiation therapy (IGRT) including intrafraction assessmentBilling for management and image-guided verification that includes interpretation of stereoscopic imaging for alignment decisions.
    76140Ultrasound guidance for needle placement (separate context)Data not available in the input.
    772953D radiotherapy plan; radiotherapy portal verification with review of image-guidanceUsed in comprehensive planning and verification workflows that may incorporate stereoscopic localization images.
    77012Fluoroscopic guidance for radiotherapy localization (non-radiation oncology specific)Related fluoroscopic or stereoscopic imaging techniques used for localization; may be used when stereoscopic x-ray guidance is part of the imaging suite workflow.

    Related Modifiers

    7 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…
    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…
    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…
    77Modifier 77 indicates that a previously performed procedure or service was legitimately repeated by a different physician or other qualified health care professional. The AMA’s CPT definition…- Use modifier 77 when a basic procedure or service already performed is repeated by a different physician or other qualified health care professional (for example, a second provider independently…
    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…
    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…

    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…
    363L00000XNurse Practitioner(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision mak…
    207K00000XAllergy & Immunology PhysicianAn allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Select…
    332900000XNon-Pharmacy Dispensing SiteA site other than a pharmacy that dispenses medicinal preparations under the supervision of a physician to patients for self-administration. (e.g. phy…
    207WX0009XGlaucoma Specialist (Ophthalmology) PhysicianAn ophthalmologist who specializes in the treatment of glaucoma and other disorders related to increased intraocular pressure and optic nerve damage. …
    207YP0228XPediatric Otolaryngology PhysicianA pediatric otolaryngologist has special expertise in the management of infants and children with disorders that include congenital and acquired condi…
    282NC2000XChildren's HospitalHospitals · General Acute Care Hospital
    261QF0050XNon-Surgical Family Planning Clinic/CenterAn entity, facility, or distinct part of a facility, or mobile unit providing non-surgical, family planning/reproductive services including physical e…

    Related ICD-10-CM Codes

    26 rows

    ICD-10-CM CodeDescription
    C18.9Malignant neoplasm of colon, unspecified
    C20Malignant neoplasm of rectum
    C22.0Liver cell carcinoma
    C25.9Malignant neoplasm of pancreas, unspecified
    C34.11Malignant neoplasm of upper lobe, right bronchus or lung
    C34.90Malignant neoplasm of unspecified part of unspecified bronchus or lung
    C43.9Malignant melanoma of skin, unspecified
    C50.911Malignant neoplasm of unspecified site of right female breast
    C50.912Malignant neoplasm of unspecified site of left female breast
    C61Malignant neoplasm of prostate

    Showing 1–10 of 26

    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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