Open Air, Low Field Strength, and Positional Magnetic Resonance Imaging (MRI) Units (CPB 0093, reviewed 2026-03-18)
Summary
Aetna considers MRI medically necessary for appropriate indications without regard to the field strength or configuration of the MRI unit. Aetna considers intermediate and low field strength MRI units, and open MRI units of any configuration including units that allow imaging when standing (Stand-Up MRI) or sitting, to be acceptable alternatives to standard closed MRI units. Aetna considers repeat MRI scans in different positions (such as flexion, extension, rotation and lateral bending) and when done with and without weight-bearing to be experimental, investigational, or unproven for all indications because of insufficient evidence of this approach.
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