CommercialCoverageMedium impact
Nerve Fiber Density Measurement
Blue Cross & Blue Shield of Mississippi·MS · Neurology, Endocrinology, Pain Management +1 more·Medical Policy
We identified it
Jun 20, 2026
Summary
This BCBS Mississippi policy defines strict criteria for when skin biopsy with nerve fiber density measurement is considered medically necessary for diagnosing small fiber neuropathy. The test is only covered when patients have painful sensory neuropathy symptoms, no history of known neuropathy causes, normal large-fiber function, and normal nerve conduction studies.
Action Required
Immediately: Billing team must ensure prior authorization is obtained for skin biopsy nerve fiber density testing by verifying all four medical necessity criteria are met and documented: 1) painful sensory neuropathy symptoms present, 2) no history of diabetic/toxic/HIV/celiac/inherited neuropathy, 3) normal muscle reflexes and vibration/proprioception sensation, and 4) normal EMG/nerve conduction studies. Claims not meeting all criteria will be denied as investigational.