This content is for general informational purposes and does not constitute medical, legal, or financial advice. Healthcare rules and costs change annually. Last reviewed: January 1, 2025. Always verify current details with your insurer, employer, or a licensed healthcare navigator.
Medical Necessity
The standard insurers use to determine whether a service is appropriate and required for your condition.
Full Definition
Medical necessity is the standard used by insurers to determine whether a healthcare service, procedure, or treatment is appropriate, reasonable, and required for the diagnosis or treatment of an illness or injury. Services must be medically necessary to be covered by insurance. Insurers use their own clinical criteria — which may differ from your doctor's judgment — to make this determination. Denials based on lack of medical necessity can be appealed.
Real-World Example
Your doctor recommends a brand-name medication. Your insurer denies coverage, claiming the generic is 'medically necessary and sufficient.' Your doctor can submit documentation showing why the brand-name is medically necessary for you, potentially overturning the denial.
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