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    v1.0.30
    OpenPayerBilling CodesClinical Intracavitary Radiation Hyperthermia TreatmentCPT cpt-77620-invasive-hyperthermia-probe-tumor-therapy
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    CPT 77620: Intracavitary/Intratumoral Hyperthermia Therapy

    Medicare pays $509 on average nationally for this procedure.

    CPT code 77620 describes insertion of a probe into a body cavity or tumor to deliver localized hyperthermia therapy (raising tissue temperature up to 113°F) to treat tumors; service type: invasive thermal tumor therapy; typical site of service: inpatient or outpatient procedural settings where intracavitary or intratumoral probes can be placed, such as operating rooms, procedure suites, or specialized radiation oncology/hyperthermia treatment areas.

    For related coverage guidance, see recent payer policy updates: Dental Anesthesia Services, Anesthesia Services for Interventional Pain Management Procedures in an Adult, General Anesthesia and Conscious Sedation Services.

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    Table of contents

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    Clinical & Coding Specifications

    Clinical Context

    A typical patient is an adult with a localized pelvic or abdominal malignancy (for example, recurrent rectal carcinoma or pelvic soft tissue sarcoma) who has undergone prior surgery and radiation and presents with a localized tumor accessible via a body cavity. The oncology team schedules intracavitary hyperthermia to enhance local tumor control. The workflow includes pre-procedure evaluation by a radiation oncologist or surgical oncologist, informed consent, imaging review to confirm tumor location and proximity to critical structures, and anesthesia planning (local, monitored anesthesia care, or general as indicated). In the procedure suite or operating room, the provider inserts a specialized hyperthermia probe into the body cavity or directly into the tumor under image guidance. The device delivers controlled heating (up to 113°F) to the target tissue while monitoring patient vitals and tissue temperatures. Post-procedure monitoring occurs in recovery until the patient meets discharge criteria or is admitted for observation if needed. Typical sites of service are an outpatient procedure suite, ambulatory surgical center, or hospital operating room depending on anesthesia needs and complexity.

    Related CPT Codes

    CPT CodeDescriptionRelationship to This Procedure
    CPT data not providedData not available in the input.Data not available in the input.
    CPT data not providedData not available in the input.Data not available in the input.
    CPT data not providedData not available in the input.Data not available in the input.

    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…
    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…
    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…
    80CPT® Modifier 80 (Assistant Surgeon) is appended to a surgical CPT code when a physician (MD or DO) provides full, continuous assistance throughout the operative procedure. It is intended only for…- Use CPT Modifier -80 when a physician (MD or DO) serves as an assistant surgeon and provides full, continuous assistance throughout the entire operative procedure; append -80 to the surgical CPT…
    82Modifier 82 is appended to a surgical CPT code to indicate that an attending physician acted as an assistant because a qualified resident surgeon was unavailable. In teaching hospitals it documents…- When to use: Append modifier 82 in teaching-hospital settings to indicate a physician served as an assistant surgeon because a qualified resident surgeon was unavailable (includes situations where…

    Related Provider Taxonomies

    8 rows

    Taxonomy Code
    246ZI1000X
    261QM1200X
    2080P0202X
    363LF0000X
    364SM0705X
    225200000X
    103TW0100X
    310500000X

    Related Payer Policy Updates

    Specialty: Anesthesiology1 / 3

    10 rows

    PolicyPayerEffective Date
    Dental Anesthesia ServicesProvidence Health Plan2026-10-01
    Anesthesia Services for Interventional Pain Management Procedures in an AdultCigna2026-09-15
    General Anesthesia and Conscious Sedation ServicesUnitedHealthcare2026-09-01
    Intravenous Anesthetics for the Treatment of Chronic Pain and Psychiatric or Substance Use DisordersPremera Bluecross2026-07-01
    Intravenous Anesthetics for the Treatment of Chronic Pain and Psychiatric or Substance Use DisordersPremera Bluecross2026-07-01
    Intravenous Anesthetics for the Treatment of Chronic Pain and Psychiatric or Substance Use DisordersPremera Bluecross2026-07-01
    Intravenous Anesthetics for the Treatment of Chronic Pain and Psychiatric or Substance Use DisordersPremera Bluecross2026-07-01
    Elective Inpatient Services (for Idaho Only)UnitedHealthcare2026-06-01
    Sites of Servicepriority health2026-06-01
    Coverage for Ambulatory Surgery Unit (ASU)/Outpatient Facility and Anesthesia for Dental Servicesuniverahealthcare2026-05-21

    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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