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2025 CPT code 77763

Intracavitary radiation source application; complex

Refer to CPT guidelines for Radiation Oncology and specific guidelines for brachytherapy.The complexity of the application is determined by the number of sources/ribbons used (greater than 10 is considered complex).

Modifiers may be applicable. Modifier 22 may be used for increased procedural services. Modifiers 26 and TC may be used to indicate the professional and technical components, respectively.Modifier 52 may be used for reduced services and modifier 53 for discontinued procedures.

Medical necessity for this procedure is determined by the diagnosis, stage, and location of the cancer being treated.Intracavitary brachytherapy is typically used when the cancer is localized and can be effectively targeted with this method.

The therapeutic radiologist is solely responsible for supervising the radioelements and interpreting the dose.They will determine the appropriate number and placement of radioactive sources within the body cavity.

IMPORTANT:Do not report 77761-77763 in conjunction with Category III codes 0394T or 0395T. For insertion of ovoids and tandems, use 57155. For insertion of Heyman capsules, use 58346.For high dose-rate electronic brachytherapy, see 0394T, 0395T.

In simple words: This procedure involves placing more than 10 radioactive sources inside a body cavity, such as the vagina, prostate, or lungs, to treat cancer.The implants are placed near the tumor and left in place for a period of time.

This code describes a complex intracavitary radiation source application, involving the placement of more than 10 radioactive sources within a body cavity (e.g., vagina, prostate, lungs) to treat cancer.This includes admission to the hospital and daily visits.

Example 1: A patient with cervical cancer undergoes intracavitary brachytherapy with placement of 12 radioactive sources in the vagina., A patient with prostate cancer receives brachytherapy with 15 radioactive seeds implanted in the prostate gland., A patient with lung cancer undergoes intracavitary brachytherapy with placement of 11 radioactive ribbons in the affected lung.

Documentation should include the number and type of radioactive sources used, the location of placement, the dose delivered, and any associated imaging guidance used. Physician notes should clearly document the medical necessity for the procedure, including the diagnosis, stage of cancer, and treatment plan.

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