Summary & Overview
CPT 61770: Stereotactic Intracranial Radiation Catheter Placement
CPT code 61770 covers stereotactic, image-guided removal of a skull bone segment and insertion of a catheter or probe to place a radiation source within a brain lesion. The procedure enables precise, localized delivery of interstitial radiation (brachytherapy) for intracranial tumors or focal brain lesions, reducing exposure to surrounding healthy tissue. Nationally, this code represents an important neurosurgical technique for managing select brain neoplasms and recurrent lesions where targeted radiation is clinically indicated.
Key payers included in the analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers can expect a concise review of what CPT code 61770 represents, typical sites of service, and the clinical context of image-guided intracranial radiation catheter placement. The publication also outlines billing and coding considerations relevant to this neurosurgical service, summarizes common modifiers used with the code, and highlights where data is not available in the input.
This document is intended for clinicians, billing professionals, and policy analysts seeking a national overview of the clinical purpose and billing context of CPT code 61770, along with pointers to operational and reimbursement-related issues that commonly arise with image-guided intracranial brachytherapy procedures.
Billing Code Overview
CPT code 61770 describes a neurosurgical procedure in which a portion of the skull bone is removed and a catheter or probe is inserted using coordinates mapped from computed tomography (CT) and/or magnetic resonance imaging (MRI) to place a radiation source into a brain lesion. This is a targeted intracranial brachytherapy or interstitial radiation placement technique guided by stereotactic imaging.
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Service type: Image-guided intracranial catheter or probe placement for delivery of a radiation source
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Typical site of service: Hospital operating room or neurosurgical suite (inpatient or outpatient surgical setting)
Data not available in the input.
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult with a solitary or limited metastatic brain lesion or a primary brain tumor (for example, recurrent glioma) identified on MRI and CT imaging, causing focal neurologic symptoms such as new-onset hemiparesis, seizures, or progressive cognitive decline. The neurosurgeon and radiation oncologist review cross-sectional imaging and stereotactic planning to determine candidacy for intracranial brachytherapy via a catheter or radioactive seed implantation. In the operating room under general anesthesia, a small craniotomy or burr hole is created to access the lesion site. Intraoperative neuronavigation using computed tomography and/or magnetic resonance imaging coordinates guides insertion of the catheter or probe to the predetermined target. The device is positioned to deliver a localized radiation source to the lesion while minimizing exposure to surrounding brain. Postoperative imaging confirms placement, and the patient is monitored in a post-anesthesia care unit or intensive care setting depending on clinical status. Typical perioperative workflow includes preoperative imaging and clearance, intraoperative stereotactic guidance and device placement corresponding to 61770, immediate postoperative imaging, and coordination with radiation oncology for any additional planning or follow-up brachytherapy dosing decisions.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services |