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2025 CPT code 77371

Radiation treatment delivery, stereotactic radiosurgery (SRS), complete course of treatment of cranial lesion(s) consisting of 1 session; multi-source Cobalt 60 based.

Follow the official CPT coding guidelines for radiation oncology and stereotactic radiosurgery procedures.Refer to the AMA CPT manual for the most up-to-date information and clarification on any ambiguities.

Modifiers may be necessary to indicate distinct services or when billing separately for professional and technical components.Modifier 59 (distinct procedural service) may be needed if multiple procedures are performed. Modifier 26 (professional component) and TC (technical component) are often used in this context but are not required with 77371 as it is solely a technical component code.

Medical necessity is established based on the presence of a lesion amenable to stereotactic radiosurgery, appropriate for the patient's overall health condition, and with a treatment plan developed to minimize risks to healthy tissues.Documentation must support the medical necessity of the procedure based on clinical indications and risks/benefits discussion with the patient.

The radiation oncologist is primarily responsible for the clinical treatment planning, delivery, and management of the stereotactic radiosurgery procedure.This includes image review, target definition, treatment planning using sophisticated software and hardware, patient positioning, and monitoring during the treatment session.

IMPORTANT Related codes within the 77371-77387 range may be used depending on the number of treatment areas and fractions.For treatment planning and other related services, additional codes (e.g., 77263, 77295, 77301, 77432) may be necessary.For injectable or ingestible isotopes, refer to Nuclear Medicine codes.

In simple words: This code describes a specialized type of radiation therapy (stereotactic radiosurgery) where a high dose of radiation is precisely targeted at a brain tumor or abnormality to destroy it.The entire treatment is done in one visit, using multiple radiation beams focused on the target area.

CPT code 77371 represents the technical component of stereotactic radiosurgery (SRS) using a multi-source Cobalt-60 system for a single treatment session targeting one or more cranial lesions.This procedure involves precise, three-dimensional localization of the target area using imaging data (CT or MRI), followed by the delivery of a high dose of radiation from multiple sources to destroy the lesion(s) while minimizing damage to surrounding healthy tissue. The entire treatment is typically completed in a single session.

Example 1: A patient presents with a small meningioma in the brain.Stereotactic radiosurgery is planned using a multi-source Cobalt-60 system, and code 77371 is used to bill for the technical component of the single-session treatment., A patient with multiple small brain metastases undergoes stereotactic radiosurgery to treat all lesions in a single session. Code 77371 is reported, representing the technical component of the treatment of the multiple lesions in one session.Additional codes may be required based on treatment planning complexity., A patient presents with a vestibular schwannoma.After multidisciplinary discussion and detailed treatment planning, the patient undergoes a single-session stereotactic radiosurgery treatment using a multi-source Cobalt-60 system. Code 77371 is used for the technical component of the treatment delivery.

Detailed treatment plan including target volume delineation, dose calculations, and treatment parameters.Pre-treatment imaging (CT or MRI).Patient positioning documentation.Verification of radiation delivery.Treatment summary notes including details of all lesions targeted and total radiation delivered.

** Code 77371 only covers the technical component of the stereotactic radiosurgery procedure.Separate billing for professional components (e.g., physician interpretation, consultation) may be required using the appropriate modifier.Always review payer specific guidelines for billing and reimbursement rules.

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