Summary & Overview
CPT 0735T: Intraoperative Radiation Applicator Placement During Craniotomy
CPT code 0735T reports intraoperative radiation therapy applicator placement performed at the same session as a primary craniotomy. The code captures the surgical preparation of the tumor cavity and placement of a radiation applicator to deliver radiation intraoperatively, an intervention relevant to neurosurgical oncology and multidisciplinary perioperative care. Nationally, accurate coding for intraoperative radiation procedures affects operative documentation, facility and professional billing, and the integration of surgical and radiation therapy services.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical context, typical site-of-service considerations, and the common modifiers associated with this intraoperative procedure. The publication also outlines benchmarking and coverage considerations relevant to hospital billing teams, surgical practices, and radiation oncology departments.
This summary provides clinical context and billing clarity for coding teams and revenue cycle staff, including how the service is reported relative to the primary craniotomy. Where payer-specific policies are available, the publication highlights differences in coverage and documentation expectations. Data not available in the input is clearly noted in relevant sections.
Billing Code Overview
CPT code 0735T describes preparation of the tumor cavity and placement of a radiation therapy applicator for intraoperative radiation therapy when performed at the same session as a primary craniotomy. This service is delivered during the operative session as part of surgical management of an intracranial tumor.
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Service type: Intraoperative radiation therapy applicator placement during craniotomy
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Typical site of service: Operating room during a primary craniotomy
Data not available in the input for associated taxonomies, ICD-10 diagnoses, and related codes.
Clinical & Coding Specifications
Clinical Context
A 58-year-old patient with a newly diagnosed solitary brain metastasis undergoes a planned craniotomy for tumor resection. At the same operative session, after maximal safe resection, the neurosurgeon prepares the tumor cavity and places a radiation therapy applicator for intraoperative radiation therapy to deliver a concentrated dose to the resection bed while minimizing exposure to surrounding brain. The workflow includes preoperative imaging review and oncologic planning with radiation oncology, intraoperative frozen-section confirmation of tumor margins as needed, placement and securement of the applicator within the tumor cavity, verification of applicator position by the surgical team and intraoperative imaging when indicated, coordination with the radiation oncology team to deliver the prescribed single-session dose in the operating room or adjacent procedure suite, removal of the applicator after treatment, and completion of the craniotomy closure. Typical perioperative documentation includes the indication for intraoperative radiotherapy, description of cavity preparation, applicator type and size, radiation dose and duration (as documented by the radiation oncology team), patient tolerance, and any intraoperative complications. Typical patient monitoring continues postoperatively in the post-anesthesia care unit with standard neurosurgical and radiation oncology postoperative assessments.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when intraoperative complexity or work exceeds typical expectations for the tumor cavity preparation and applicator placement and documentation supports additional work. |