Summary & Overview
CPT 64492: Cervical/Thoracic Facet Joint Image-Guided Injection, Third Level
CPT code 64492 is an add-on procedure code for image-guided injection of a diagnostic or therapeutic substance into a cervical or thoracic paravertebral facet (zygapophyseal) joint, or the nerves supplying that joint, representing the third treated facet level and any additional unilateral levels. The code matters nationally as image-guided spinal injections are common in managing neck and thoracic facet-mediated pain and are subject to payer-specific coverage, utilization controls, and reimbursement policies.
Key payers in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find an overview of how 64492 is categorized and billed as an add-on service, typical sites of service where it is performed, and the clinical context in which it is used (diagnostic and therapeutic facet joint or medial branch interventions under fluoroscopy or CT guidance). The publication also summarizes common modifiers associated with interventional procedures, payer coverage patterns and coding considerations, and benchmarking elements relevant for practice administrators and billing staff.
This national-level summary is designed to equip clinicians, coding professionals, and policy analysts with concise context on clinical application, billing implications, and areas where payer policy differences commonly arise. Data not available in the input: specific associated taxonomies, ICD-10 diagnoses, and payer-specific reimbursement rates.
Billing Code Overview
CPT code 64492 describes an add-on image-guided injection of a diagnostic or therapeutic substance into a cervical or thoracic paravertebral facet (zygapophyseal) joint, or into the nerves that supply that joint. This code represents the service provided at a third facet joint level and any additional levels on one side when performed under imaging guidance such as fluoroscopy or computed tomography (CT).
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Service type: Image-guided diagnostic or therapeutic paravertebral facet joint injection (add-on for third and additional levels, unilateral)
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Typical site of service: Ambulatory surgical center or hospital outpatient department; may also be performed in office settings equipped with appropriate imaging guidance
Clinical & Coding Specifications
Clinical Context
A 52-year-old patient with chronic, axial neck pain and unilateral cervical radicular symptoms presents after failed conservative care including physical therapy, oral analgesics, and epidural steroid trial. Imaging (MRI/CT) demonstrates facet arthropathy at multiple cervical and upper thoracic levels. The pain specialist schedules a diagnostic/therapeutic fluoroscopically guided cervical/thoracic facet joint injection and medial branch block series. The procedure includes a diagnostic injection at the first and second facet joint levels on the symptomatic side followed by the service described by 64492 for the third and any additional contiguous facet joint levels on the same side. The workflow includes informed consent, pre-procedure timeout, sterile preparation, local anesthesia, fluoroscopic localization, contrast confirmation of intra-articular or peri-neural placement, injection of anesthetic and/or steroid, post-procedure observation for immediate complications, and documentation of levels injected, laterality, medication volumes and concentrations, imaging guidance used, and patient response to diagnostic anesthetic.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
26 | Professional component | When reporting only the physician component of imaging guidance if separated from technical component |