Summary & Overview
CPT 36228: Intracranial Branch Angiography, Add-On Imaging Supervision
Headline: CPT code 36228: Add-on imaging supervision and interpretation for intracranial branch angiography. Lead: CPT code 36228 designates an add-on service for imaging supervision and interpretation when a catheter is advanced into additional branches of intracranial subdivisions of the internal carotid or vertebral arteries, such as the middle cerebral artery and the posterior inferior cerebellar artery, during the same session as internal or common carotid angiography. This code matters nationally because it captures the additional professional work and imaging interpretation associated with more complex neuroangiographic procedures, influencing billing accuracy and hospital and payer claim adjudication.
Key payers covered in this analysis include: Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. The coverage and payment policies from these national payers affect provider revenue for complex neurointerventional diagnostic procedures and can shape utilization patterns.
What readers will learn: This publication summarizes the clinical context and service characteristics of CPT code 36228, outlines typical sites of service and the procedural scenario in which the add-on code is reported, and identifies common payer considerations and coding practice implications. It provides benchmarks for how the code is used in conjunction with primary angiography codes, explains national payer relevance, and highlights where additional documentation is typically required. Data not available in the input is noted where payer-specific coverage rules, associated taxonomies, and ICD-10 pairing guidance are not provided.
Billing Code Overview
CPT code 36228 is an add-on angiography procedure for imaging supervision and interpretation when catheters are placed into additional branches of the intracranial subdivisions of the internal carotid or vertebral arteries. The description specifies performance of angiography of the circulation of the middle cerebral artery and the posterior inferior cerebellar artery during the same session in which the provider places a catheter and performs angiography of the internal carotid or common carotid artery.
Service type: Diagnostic angiography, intracranial vessel branches (add-on imaging supervision and interpretation)
Typical site of service: Hospital-based interventional radiology or neurointerventional suite; may also occur in an ambulatory surgical center capable of neuroangiography
Clinical & Coding Specifications
Clinical Context
A 62-year-old patient presents with sudden-onset severe headache and focal neurologic deficits. Noncontrast head CT excludes large hemorrhage, and CT angiography demonstrates a suspected intracranial aneurysm in the middle cerebral artery (MCA) distribution. The neurointerventional team schedules diagnostic cerebral angiography with possible endovascular treatment. During the procedure the interventional neuroradiologist obtains arterial access (commonly femoral or radial), advances a catheter into the internal carotid artery, and performs angiography of the carotid circulation. To fully evaluate the MCA and posterior inferior cerebellar artery (PICA) branches, the physician places additional microcatheters into intracranial subdivisions of the internal carotid and vertebral arteries and performs focused branch angiography with live fluoroscopic imaging and documentation. The service billed with 36228 is an add-on code for imaging supervision and interpretation when separate catheterizations of additional intracranial branches (for example MCA and PICA) are performed during the same session. Typical site of service is an inpatient or outpatient hospital-based angiography suite or an ambulatory surgical center with full neurointerventional capabilities. Workflow includes pre-procedure consent and history review, vascular access and catheter placement by the primary operator, imaging supervision and interpretation by the billing physician for the additional intracranial branch angiograms, intraprocedural documentation, and post-procedure angiographic review with contrast runs archived in the PACS.
Coding Specifications
| Modifier | Description | When to Use |
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