A single phrase can wipe out months of careful planning, a doctor’s recommendation, and your sense of security in one cold paragraph: not medically necessary. Those words carry enormous power inside the health insurance system. They decide whether you receive a surgery, a medication, a scan, or a therapy session without financial ruin. They shape whether your insurer pays tens of thousands of dollars or shifts that burden straight onto you.
Insurance companies defend the concept of medical necessity as a guardrail against waste and fraud, and that idea sounds reasonable on its face. Yet the way insurers define and apply medical necessity often leaves patients stunned and scrambling.
