Summary & Overview
CPT 61705: Craniotomy with Arterial Occlusion for Cerebral Vascular Lesion
CPT code 61705 identifies an open neurosurgical procedure — craniotomy with arterial occlusion — used to stop blood flow to intracranial aneurysms, congenital vascular malformations, or carotid cavernous fistulae. It represents a high-acuity operative service that addresses life-threatening cerebrovascular pathology and is performed in hospital operating rooms, often with critical perioperative and postoperative resource use.
Key national payers addressed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise clinical context for the procedure, payer coverage scope, and the operational setting where the service typically occurs. The publication outlines billing and coding context for CPT code 61705, highlights common modifiers associated with complex operative services, and summarizes expected service line placement and site-of-service considerations. It also provides benchmarking and policy-relevant notes useful for revenue cycle, clinical leadership, and coding professionals managing high-acuity neurosurgical cases.
This summary is written for a national audience and focuses on what CPT code 61705 represents, why it matters in acute cerebrovascular care, and what topics the full publication covers to support billing accuracy and administrative planning.
Billing Code Overview
CPT code 61705 describes a neurosurgical procedure in which the surgeon performs a craniotomy and occludes arterial blood flow to treat cerebral vascular lesions. The procedure involves removal of a section of skull bone to access intracranial vessels and then stopping blood flow to an aneurysm, vascular malformation, or carotid cavernous fistula. The surgeon may also occlude the carotid artery at the cervical spine level by placing surgical clips on the carotid artery during the same operation.
Service type: Open neurosurgical vascular occlusion
Typical site of service: Inpatient or operating room setting at an acute care hospital or tertiary care center
Clinical & Coding Specifications
Clinical Context
A 54-year-old patient presents to the emergency department with sudden severe headache, nausea, and focal neurologic deficits. CT head demonstrates subarachnoid hemorrhage and CTA identifies a ruptured saccular anterior communicating artery aneurysm. After neurosurgical and neuroendovascular evaluation, the patient is scheduled for an open craniotomy for aneurysm clipping with temporary cervical carotid occlusion to control inflow during dissection and clip placement. The clinical workflow includes preoperative evaluation and consent, general anesthesia with neurophysiologic monitoring, a pterional craniotomy, proximal control via temporary clips on the cervical internal carotid artery as needed, microsurgical dissection of the aneurysm neck, permanent clip placement across the neck, hemostasis, closure of the craniotomy, postoperative ICU monitoring for vasospasm and neurologic status, and follow-up imaging to confirm aneurysm occlusion and vessel patency.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | Related to another payer; treatment in primary payer's network | Use when submitting to a secondary payer that requires a code indicating primary payer payment exists. |
11 | Default/standard billing |