CPT code 61120 denotes a surgical cranial access procedure in which a provider drills holes in the skull to access the intracranial space for diagnostic injections. This code is used for invasive diagnostic approaches that enable direct intracranial delivery of contrast or other diagnostic agents and is relevant for neurosurgical and diagnostic imaging workflows. Nationally, appropriate reporting of 61120 matters for accurate clinical documentation, facility resource planning, and payer adjudication of complex neurosurgical diagnostic services.

Key payers commonly involved in coverage and claims adjudication include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of the clinical context for the procedure, typical sites of service, and common modifiers associated with reporting. The publication provides benchmarks and policy-relevant summaries where available, outlines payer coverage themes, and highlights coding nuances that affect clinical documentation and reimbursement pathways.

The report is intended for clinicians, coding professionals, and policy stakeholders seeking clarity on when 61120 applies, how it is positioned among neurosurgical diagnostic services, and what documentation elements are typically required for payer review. Data not available in the input is noted where applicable.