When ABA therapy is denied, you have the legal right to a formal internal appeal — file it in writing within the insurer's appeal window (typically 30–180 days) with a letter of medical necessity from the treating BCBA. If the internal appeal fails, you can request an independent external review, which is binding on the insurer in most states. Denials citing 'experimental' or 'not medically necessary' are the most common and the most successfully overturned on appeal.
How to Appeal an ABA Therapy Insurance Denial A denial letter from your insurance company is frustrating, but it is not the end of the road. Most plans that deny ABA therapy coverage have a formal appeal process, and federal law gives most enrollees the right to request an independent review of any denial. The process takes real effort, but a well-documented appeal is far from a long shot. This guide explains how the appeal process works, what a strong appeal includes, and what to do if the inte
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