Summary & Overview
CPT 62161: Endoscopic Intracranial Cyst/Adhesion Removal with Ventricular Catheter
CPT code 62161 captures endoscopic intracranial procedures that remove adhesions or cysts from the septum pellucidum or ventricular system and that include placement, replacement, or removal of a ventricular catheter for shunting or external drainage. This code is clinically important because it covers minimally invasive neurosurgical approaches to treat intraventricular cysts, obstructive processes, and shunt-related cerebrospinal fluid management, procedures that can reduce morbidity compared with open craniotomy in selected patients.
Key payers considered in this national overview include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise summary of the clinical setting and service type, typical site-of-service patterns, and the common modifier set associated with reporting. The publication outlines where CPT code 62161 fits within neurosurgical practice and billing workflows and provides context for utilization and coverage considerations at a national level.
This report does not provide clinical recommendations or state-specific rules. Data not available in the input is noted where applicable. The content is intended to inform policy, coding, and revenue teams about the clinical scope and billing context of CPT code 62161.
Billing Code Overview
CPT code 62161 describes an endoscopic intracranial procedure in which a small endoscope is used to remove adhesions or a cyst from the septum pellucidum or from within a cerebral ventricle. The procedure also includes placement, replacement, or removal of a ventricular catheter for a shunt system or for external cerebrospinal fluid drainage.
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Service Type: Endoscopic intracranial cyst or adhesion removal with ventricular catheter management
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Typical Site of Service: Inpatient or outpatient hospital operating room, or ambulatory surgery center for neurosurgical procedures
Clinical & Coding Specifications
Clinical Context
A 48-year-old patient presents with progressive headaches, intermittent nausea, and recent gait instability. Neuroimaging (MRI and CT) demonstrates an intraventricular cyst located within the lateral ventricle with obstructive hydrocephalus and enlargement of the lateral ventricles. The neurosurgery team elects to perform an endoscopic intraventricular procedure to fenestrate and remove the cyst and to place a ventricular catheter connected to an external ventricular drain or permanent shunt system as indicated.
Preoperative workflow includes history and physical, review of imaging, anesthesia evaluation, and informed consent. In the operating room under general anesthesia, the neurosurgeon makes a small scalp incision, creates a burr hole, and introduces a neuroendoscope into the lateral ventricle. Under endoscopic visualization, the surgeon marsupializes or removes the septum pellucidum cyst or intraventricular cyst and inspects for adhesions. A ventricular catheter is then placed, tunneled, and either connected to an external drainage system for temporary management or to a shunt reservoir for long-term CSF diversion. Postoperative workflow includes imaging to confirm catheter position and cyst decompression, neurological monitoring, management of intracranial pressure, and discharge planning with shunt follow-up if applicable.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | No modifier — standard reporting | Use when no specific modifier applies and the service is unaltered. |