Summary & Overview
CPT 61120: Cranial Access for Diagnostic Intracranial Injection
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.
Billing Code Overview
CPT code 61120 describes the surgical creation of one or more holes in the skull to gain direct access to the intracranial space for diagnostic injections. This procedure is a diagnostic cranial access procedure performed to permit delivery of contrast agents or other diagnostic substances directly into the intracranial compartment.
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Service type: Diagnostic surgical procedure involving cranial access for intracranial injections
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Typical site of service: Hospital operating room or specialized surgical suite
Clinical & Coding Specifications
Clinical Context
A 52-year-old patient with refractory trigeminal neuralgia is referred to neurosurgery for diagnostic intracranial injections to confirm pain origin prior to definitive surgical intervention. The patient arrives to the ambulatory surgery center after preoperative assessment. Under monitored anesthesia care, the neurosurgeon identifies the target site and uses sterile technique to drill a burr hole into the skull to access the intracranial space for administration of diagnostic anesthetic or contrast. Intraoperative neuro-navigation and fluoroscopy may be used to guide placement. The team documents indication, informed consent, anesthesia type, size and number of burr holes, agent injected, and immediate neurologic status. Post-procedure, the patient recovers in PACU with neurologic checks, wound care instructions, and follow-up arranged to interpret diagnostic response and plan further definitive therapy.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
00 | Service not reported with modifier — not commonly used clinically | Rarely used; included in payer systems but not typically appended to surgical codes |
11 | Standard procedure performed |