Does G44.53 require prior authorization?

No, G44.53 does not require prior authorization (high confidence). Covered without prior authorization.

`G44.53`, Primary thunderclap headache

ICD-10-CM

No Prior Auth Required

Covered without prior authorization (high confidence)

This article provides billing/coding guidelines that complement Local Coverage Determination L34417 for CT of the head; consult LCD L34417 for specific coverage, coding, and documentation requirements.
Medical records must include history and physical notes, laboratory results, and documentation of signs and symptoms that warrant the head/neck diagnostic imaging.
Accurate HCPCS/CPT coding must be submitted to differentiate CT and MRI scans from other radiology services and to support coverage determinations.
Documentation and supporting information must be available to Medicare upon request.

CT or MRI scans of the head or neck are covered when the medical record documents the scan is reasonable and necessary for diagnostic evaluation.
Coverage requires documentation supporting clinical indication such as history and physical exam findings, laboratory results, and signs or symptoms that justify the diagnostic test.
Computed tomography cerebral perfusion analysis (CPT 0042T) is covered when the CTP study is performed in a certified stroke center.
Follow the attached Local Coverage Determination (LCD) for specific clinical indications for Computed Tomography Cerebral Perfusion Analysis (CTP); this billing/coding article complements that LCD.
CTP with automated post-processing is medically reasonable and necessary for patients with acute ischemic stroke (AIS) caused by a unilateral large vessel occlusion (LVO) in the proximal anterior circulation evaluated at stroke centers to aid selection for endovascular mechanical thrombectomy (EVT).
CTP may be used to aid selection for EVT when femoral puncture (treatment) can be started within 6–24 hours of last known well and the patient meets the DAWN pre-CTP inclusion/exclusion criteria.

CGS-J15-L38694, Computed Tomography Cerebral Perfusion Analysis (CTP)

J15

CGS-J18-L38694, Computed Tomography Cerebral Perfusion Analysis (CTP)

J18

A56612, Billing and Coding: CT of the Head

A57204, Billing and Coding: MRI and CT Scans of the Head and Neck

A58218, Billing and Coding: Computed Tomography Cerebral Perfusion Analysis (CTP)

Ask Backwork about documentation requirements, denial risks, or coverage in your state.