Summary & Overview
HCPCS G2191: Head Imaging for Positional Headaches
HCPCS Level II code G2191 represents diagnostic imaging services for patients with clinical indications for head imaging specifically related to positional headaches. This code identifies imaging when posture or position appears to influence headache presentation, guiding appropriate use of head-focused diagnostic modalities. Nationally, such delineation matters for consistent clinical documentation, payer adjudication, and appropriate utilization of imaging resources for headache evaluation.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the code’s clinical context, the typical sites where the service is delivered, and the implications for billing and documentation. The publication also outlines expected benchmarks and policy-relevant considerations for payers, along with the clinical scenarios that commonly prompt use of G2191.
The content provides clarity on what G2191 denotes, where the service is typically performed, and which national payers are relevant for coverage and adjudication. Data not available in the input will be noted where applicable.
Billing Code Overview
HCPCS Level II code G2191 describes imaging for patients who have clinical indications for head imaging related to positional headaches. The service type is diagnostic imaging focused on the head to evaluate positional or posture-related headache symptoms. The typical site of service is radiology or imaging departments, including hospital outpatient imaging centers and freestanding radiology centers.
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Clinical & Coding Specifications
Clinical Context
A 48-year-old patient presents to the emergency department with a 3-week history of positional headaches that worsen when upright and improve when lying flat. The clinician documents new-onset orthostatic-type headache, associated photophobia but no focal neurologic deficits. The patient has no prior intracranial surgery and no anticoagulation. After clinical evaluation and neck assessment, the treating physician orders neuroimaging to evaluate for intracranial hypotension, spontaneous cerebrospinal fluid leak, or other intracranial pathology. The typical workflow includes triage and history/physical, neurologic examination, screening for red-flag features, informed consent for imaging, and performance of the appropriate head imaging study (usually non-contrast CT head or MRI brain with and without contrast). The imaging is performed in the radiology department or the hospital imaging suite. Results are reviewed by the interpreting radiologist and communicated to the ordering clinician; further steps (lumbar puncture, MR myelography, specialized leak imaging) are considered based on findings. Typical site of service: hospital outpatient radiology department, emergency department imaging suite, or ambulatory imaging center. Service type: diagnostic neuroimaging for head, ordered for evaluation of positional headaches. Typical patient scenario: adult with orthostatic positional headache, no focal deficits, requiring urgent imaging to exclude structural causes or complications such as subdural fluid collections or mass effect.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 |