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2025 CPT code 77373

Stereotactic body radiation therapy, treatment delivery, per fraction.

Follow all relevant CPT coding guidelines, particularly those related to radiation oncology and the use of modifiers.

Modifiers may apply depending on the circumstances of service. Consult the official CPT manual for further guidance.

Medical necessity for SBRT is determined based on the size and location of the lesion(s), the patient's overall health status, and the potential benefits and risks of the procedure compared to other treatment options. The physician must document the rationale for selecting SBRT as the most appropriate treatment modality in the patient's case.

The clinical responsibility includes identifying the target area using stereotactic methods (3D imaging from CT or MRI), planning the radiation treatment, and delivering the prescribed dose of radiation. The physician also monitors the patient's progress and makes adjustments as needed during the course of treatment.

IMPORTANT Do not report 77373 with 77385, 77386, 77401, 77402, 77407, 77412. For single fraction cranial lesions, use 77371 or 77372.

In simple words: This code describes a type of radiation treatment where high doses of radiation are aimed precisely at small tumors in the body (not in the brain or spine). The doctor uses images to pinpoint the tumor. This code is for one treatment session; the whole course of treatment has a maximum of five sessions.

This code represents the technical component of stereotactic body radiation therapy (SBRT) treatment delivery for one or more lesions per fraction.The treatment uses a three-dimensional coordinate system to locate and precisely destroy small targets within the body (excluding the brain and spinal cord) using externally generated ionized radiation.This code covers a single fraction of a course limited to a maximum of five fractions.

Example 1: A patient presents with a small lung tumor. The physician uses SBRT, planning and delivering a single fraction treatment using code 77373. This is the first of five planned fractions., A patient with multiple small liver metastases undergoes SBRT. Code 77373 is reported for each fraction of treatment (up to a maximum of 5)., A patient with a small spinal metastasis that is not within the spinal cord requires treatment with SBRT.Because this is in the spine, the code 77373 is not used.The physician should select an appropriate alternate code.

* Comprehensive patient history including the nature and location of the lesion(s).* Imaging studies (CT or MRI) clearly delineating the target volume(s).* Treatment plan detailing the dose, fractionation, and other technical aspects of the SBRT procedure.* Documentation of treatment delivery, including verification of the target location and dose delivered.* Progress notes documenting the patient's response to treatment and any adverse effects.

** This code represents only the technical component of SBRT.Additional codes may be necessary to capture other aspects of care, such as professional component, image guidance, or treatment planning.Always refer to the most up-to-date CPT codebook and payer guidelines for accurate coding and billing.

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