Summary & Overview
CPT 61304: Supratentorial Brain Inspection via Anterior Cranial Access
CPT code 61304 refers to a neurosurgical procedure to inspect the anterior portion of the brain via cranial access above the tentorium. This code is used when other diagnostic modalities are unable to determine the cause, location, or extent of intracranial pathology, including lesions or tumors. Nationally, use of this code reflects cases requiring direct surgical visualization for diagnosis or assessment and has implications for surgical resource utilization and inpatient surgical workflows.
Key payers discussed in the analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of clinical context for when direct supratentorial inspection is indicated, typical sites of service, and common billing considerations. The publication also covers benchmarking where available, coding guidance highlights, and any recent policy updates or payer-level coverage notes that affect claim adjudication and documentation requirements.
The content provides clinicians, coders, and policy analysts with a concise reference to the clinical purpose of CPT code 61304, payer coverage landscape, and the operational context in which the code is billed. Data not available in the input are noted where applicable.
Billing Code Overview
CPT code 61304 describes a neurosurgical procedure in which the surgeon inspects the anterior (front) region of the brain by accessing the cranial cavity above the tentorium. This procedure is typically undertaken when noninvasive diagnostic testing cannot determine the cause of a neurologic condition, identify the precise location of a lesion or tumor, or assess the extent of intracranial damage.
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Service type: Open neurosurgical diagnostic/operative inspection of the anterior cranial compartment
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Typical site of service: Inpatient or outpatient hospital operating room where neurosurgical access to the supratentorial (above the tentorium) brain is performed
Data not available in the input for associated taxonomies, specific ICD-10 diagnoses, related codes, and service line.
Clinical & Coding Specifications
Clinical Context
A 54-year-old patient presents with progressive headaches, focal neurologic deficits, and an indeterminate intracranial mass on MRI. Noninvasive imaging (MRI with and without contrast, MR spectroscopy, CT) has been unable to definitively characterize the lesion or provide a safe biopsy corridor. The neurosurgical team elects a frontal craniotomy above the tentorium to directly inspect the anterior cranial fossa and frontal lobes, obtain targeted tissue for diagnosis, and assess tumor extent and resectability.
The typical workflow includes preoperative imaging review, multidisciplinary tumor board discussion, informed consent for craniotomy and possible resection, general anesthesia, scalp incision and skull flap creation, dural opening and inspection of the anterior cranial compartment, targeted biopsy or partial resection as indicated, hemostasis, closure of dura and skull, and postoperative neurosurgical ICU monitoring with follow-up imaging and pathology-directed management.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
11 | Physician or other qualified health care professional service by the reporting provider | Use when the service is performed as billed by the primary surgeon without unusual circumstances. |
22 |