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    v1.0.30
    OpenPayerBilling CodesRadiation Treatment ManagementCPT cpt-77432-single-session-stereotactic-radiosurgery-professional
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    CPT 77432: Stereotactic Radiosurgery, Single Session (Professional Component)

    Medicare pays $435 on average nationally for this procedure.

    CPT code 77432 represents the professional service for single‑session stereotactic radiosurgery (SRS) for intracranial lesions, where the radiation oncologist manages a complete course of highly focused, image‑guided external beam ionizing radiation using a three‑dimensional coordinate system to localize and ablate small brain targets; service type: stereotactic radiosurgery (professional component); typical site of service: hospital outpatient radiation oncology department or freestanding radiation oncology center.

    For related coverage guidance, see recent payer policy updates: Radiation oncology coverage and treatment delivery guidelines, Proton Beam Therapy, Radiation and Oncologic Procedures.

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    Table of contents

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    Clinical & Coding Specifications

    Clinical Context

    A typical patient is an adult referred to a tertiary radiation oncology center for single‑fraction stereotactic radiosurgery (SRS) to a small intracranial target. The patient commonly presents with a solitary brain metastasis, small primary brain tumor (e.g., meningioma), or a benign lesion such as an arteriovenous malformation. Diagnostic workup includes MRI brain with and without contrast and multidisciplinary review by neurosurgery and radiation oncology. The radiation oncologist performs simulation (immobilization, high‑resolution imaging with a stereotactic coordinate system or frame), reviews imaging, develops a single‑session treatment plan using three‑dimensional localization, and directs delivery of a high‑dose, precisely targeted external beam in one session. The professional component (physician management, target delineation, treatment planning review, and verification) is reported with 77432. Typical team members include the radiation oncologist, medical physicist, dosimetrist, radiation therapists, and nursing staff. Typical site of service is an outpatient radiation oncology department, hospital outpatient department, or specialized radiosurgery center. Billing reflects the physician professional component; the technical component (equipment, delivery) is billed separately when applicable.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    77373Stereotactic radiosurgery, planning; complex, including dose‑volume histograms and plan reportOften billed for the complex planning component associated with single‑fraction SRS when billed separately from physician management.
    77334Stereotactic radiation treatment delivery, per fraction for stereotactic body radiotherapy (SBRT)Used for image guidance or delivery codes when a fractionated stereotactic delivery technique is used instead of single‑session SRS; distinguishes fractionated courses from single‑session 77432.
    77014Computed tomography guidance for localization during stereotactic radiosurgeryUsed when CT guidance is performed for localization or verification in planning or delivery phases.
    95970Electronic analysis of implanted neurostimulator pulse generator system (includes interrogation and programming) — (included here to indicate device‑related services)May be used when patient has implanted devices requiring pre‑ or post‑procedure device checks that affect planning or delivery.
    77338Multileaf collimator device — once per courseBilled when specialized beam‑shaping devices are used in treatment delivery; relates to the technical portion of delivery coordinated with 77432 professional services.

    Related Modifiers

    10 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…
    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…
    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…
    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…
    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…
    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…
    27Modifier 27 indicates a separate, subsequent outpatient hospital E/M service provided to the same patient on the same date by a different provider in a hospital outpatient setting. It is a…- Use modifier -27 on facility (hospital outpatient/ambulatory service center) claims to report a subsequent, separate, and distinct outpatient E/M service provided to the same patient on the same…
    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…
    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
    207L00000X
    2080P0206X
    208D00000X
    2084P0800X
    207RH0005X
    171R00000X
    207ZC0500X
    2471Q0001X

    Related ICD-10-CM Codes

    26 rows

    ICD-10-CM CodeDescription
    C71.0Malignant neoplasm of cerebrum, except lobes and ventricles
    C71.1Malignant neoplasm of frontal lobe
    C71.2Malignant neoplasm of temporal lobe
    C71.3Malignant neoplasm of parietal lobe
    C71.4Malignant neoplasm of occipital lobe
    C71.5Malignant neoplasm of cerebral ventricle
    C71.9Malignant neoplasm of brain, unspecified
    C75.1Malignant neoplasm of pituitary gland
    C79.31Secondary malignant neoplasm of brain
    C79.32Secondary malignant neoplasm of cerebral meninges

    Showing 1–10 of 26

    Related Payer Policy Updates

    Specialty: Radiation Oncology1 / 2

    10 rows

    PolicyPayerEffective Date
    Radiation oncology coverage and treatment delivery guidelinesevicore2026-11-05
    Proton Beam Therapyuniversityofutahhealthplans2026-10-25
    Radiation and Oncologic ProceduresUnitedHealthcare2026-09-01
    Electronic Brachytherapy for Nonmelanoma Skin CancerBluecross Idaho2026-07-30
    Surface Radiation Therapy for Treatment of Non-Melanoma Skin Cancereocco2026-07-09
    Radiofrequency Ablation of Tumors Outside the LiverProvidence Health Plan2026-07-01
    Therapeutic Radiopharmaceuticals in Oncology (Lutathera, Pluvicto, Xofigo) Coverage CriteriaBlue Cross Blue Shield - North Carolina2026-07-01
    Intensity Modulated Radiation TherapyAmbetter Georgia2026-06-01
    Irreversible Electroporation (IRE) of Tumors Other Than LiverBlue Cross Blue Shield - Rhode Island2026-06-01
    Irreversible Electroporation (IRE) — NanoKnife (Preauthorization Required)Blue Cross Blue Shield - Nebraska2026-06-01

    Related Codes

    CPT-77427-RADIATION-THERAPY-MANAGEMENT-EXTERNAL-BEAM

    CPT 77427: Radiation Treatment Management

    CPT-77431-RADIOTHERAPY-MANAGEMENT-ONE-TWO-FRACTION-COURSE

    CPT 77431: Management of Short-Course Fractionated Radiotherapy

    CPT-77435-STEREOTACTIC-BODY-RADIOTHERAPY-TREATMENT-MANAGEMENT

    CPT 77435: Stereotactic Body Radiotherapy Course (≤5 Fractions)

    CPT-77437-SUPERFICIAL-RADIATION-THERAPY-PER-FRACTION

    CPT 77437: Superficial Radiation Therapy, Per Fraction

    CPT-77438-ORTHOVOLTAGE-SURFACE-RADIATION-THERAPY-SINGLE-FRACTION

    CPT 77438: Orthovoltage Surface Radiation Therapy, Single Fraction

    CPT-77439-ULTRASOUND-GUIDED-SRT-FIELD-PLACEMENT

    CPT 77439: Ultrasound-Guided SRT Field Localization for Cutaneous Tumors

    CPT-77469-INTRAOPERATIVE-RADIATION-THERAPY-IORT-DURING-SURGERY

    CPT 77469: Intraoperative Radiation Therapy Management

    CPT-77470-SPECIAL-RADIOTHERAPY-MANAGEMENT

    CPT 77470: Special Radiotherapy Procedures Requiring Additional Management

    CPT-77499-UNLISTED-THERAPEUTIC-RADIOLOGY-TREATMENT-MANAGEMENT

    CPT 77499: Therapeutic Radiology Treatment Management, Unlisted

    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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