Summary & Overview
CPT 77620: Invasive Hyperthermia Probe Tumor Therapy
CPT code 77620 designates an invasive hyperthermia procedure in which a probe is inserted into a body cavity or tumor to deliver therapeutic heat (up to 113°F) to treat tumors located in or adjacent to that cavity. The code captures a specialized oncologic intervention used as a primary, adjunctive, or palliative modality to damage tumor tissue via controlled thermal energy. Nationally, this code matters because it represents a resource-intensive, procedure-based cancer therapy that intersects hospital, outpatient surgical, and oncology practice settings and may have variable coverage across major payers.
Key payers covered in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of clinical context and typical sites of service, a summary of common billing modifiers, and what is and is not available in the supplied input. The publication outlines benchmarking and coverage considerations at a national level, highlights documentation and coding elements tied to the procedure description, and identifies gaps where additional payer policy detail, ICD-10 linkage, and related codes are not available in the input.
Billing Code Overview
CPT code 77620 describes a therapeutic hyperthermia procedure in which a provider inserts a probe into a body cavity or tumor and delivers controlled heat, reaching temperatures up to 113 degrees Fahrenheit, to treat tumors in close proximity to or within that cavity. This is an invasive, localized tumor ablation or cytotoxic adjunct technique performed to damage tumor tissue through elevated temperature.
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Service type: Image- or probe-guided invasive hyperthermia tumor treatment
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Typical site of service: Hospital inpatient or outpatient procedure room, ambulatory surgical center, or specialized oncology treatment suite where invasive probe placement and thermal therapy can be performed safely.
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.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | Use when billing only the physician's interpretation or professional services separate from technical component. |
50 | Bilateral procedure | Use when identical hyperthermia procedure is performed bilaterally in paired organs or cavities. |
52 | Reduced services | Use when the procedure is partially reduced or not completed as planned but still performed. |
53 | Discontinued procedure | Use when the procedure is started but terminated for patient-related or clinical reasons before completion. |
59 | Data not available in the input. | Data not available in the input. |
62 | Two surgeons | Use when two surgeons share responsibility for a complex case requiring simultaneous expertise. |
73 | Discontinued outpatient hospital/ASC prior to anesthesia administration | Use when the patient is prepared for the procedure but it is cancelled before anesthesia starts. |
78 | Return to OR for related procedure during postoperative period | Use when a return to the operating room is required for a related procedure after initial hyperthermia. |
80 | Assistant surgeon | Use when an assistant surgeon participates and Medicare or payer recognizes the assistant role. |
82 | Assistant surgeon (when a qualified resident surgeon not available) | Use when an assistant is required and a resident is not available. |
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Related Diagnoses
| ICD-10 Code | Description | Clinical Relevance |
|---|---|---|
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Related CPT Codes
| CPT Code | Description | Relationship to This Procedure |
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