External Review, Explained: The Appeal Step Most People Never Take

What external review is

External review means an independent organization, with no financial tie to your insurer, examines your case and decides whether the denial stands. Reviewers are typically clinicians or specialists in the relevant area of medicine. The insurer assigns its own reviewers for the internal appeal, which is why that step can feel like asking the plan to grade its own homework. External review takes the grading elsewhere, and in New York the decision is binding on the insurer. If the independent reviewer overturns the denial, the plan has to pay.

How often denials get overturned

More often than most people expect. According to the New York State Department of Financial Services, in 2025 there were 11,524 external appeal determinations, and 50.7% of them overturned the insurer's denial, in whole or in part. Read that again: about half of the denials that reached an independent reviewer did not survive. The families who got that outcome share one thing in common. They did not stop at the first no.

How the process generally works

External review usually comes after an internal appeal, although some situations qualify right away, for example when the plan missed its own deadlines or the care is urgent. You or your doctor submit a request, often within a set window after the final internal denial (in New York, generally four months), along with the denial letters and the medical records that support the case. The independent reviewer studies the file, sometimes with input from your treating doctor, and issues a decision. Standard reviews typically take about 30 to 45 days. Expedited reviews for urgent situations can take as little as 72 hours.

The strength of the file matters. Reviewers decide on documents: the denial letter's stated reason, the clinical notes, the test results, and a clear explanation of why the care meets the plan's own criteria. A complete, organized packet that answers the denial's specific reason gives the reviewer what they need to say yes.

When a denial is worth appealing

Consider appealing when the amount at stake is significant relative to the effort; when your doctor believes the care was necessary and will say so in writing; when the denial rests on a technicality, a coding issue, or a claim that the treatment is experimental; or when the plan's explanation does not match your policy. Consider it even if the internal appeal already failed, because the internal appeal was decided by the insurer, and external review is a different decision maker entirely.

Be honest about the other side too. If the service is clearly excluded by your policy, no reviewer can change the policy's terms. Deadlines matter: miss the filing window and even a strong case can be turned away unheard.

Where Cura fits

Cura's Denial Appeal Packet is document preparation. For denied claims of $3,500 or more, we organize your denial letters, records, and supporting documents into a packet built to answer the insurer's stated reason, $349 for an internal appeal packet and $599 with external review included. Cura is not a law firm and the packet is not legal advice. It is the organized, complete file that gives your appeal, and an independent reviewer, the best material to work with.