CARC code 55 — Procedure/treatment is deemed experimental/investigational
What CARC 55 means
Experimental/investigational denials mean the insurer's reviewer concluded the treatment isn't yet proven for your indication.
How to appeal a CARC 55 denial
These appeals require FDA labeling for the prescribed indication, peer-reviewed studies, and treatment guidelines from professional societies. Premium-tier appeals supply these specifically.
What InsureDefense adds
Our triage classifies your specific denial into one of ten categories and tells you exactly what evidence appeals like yours typically need. For CARC 55 denials, we usually recommend the tier that fits the category of the denial — sometimes Strong ($249) is enough, sometimes Premium ($499) with plan-language citations and peer-reviewed support is the right path. The free triage shows you which.
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Frequently asked questions
What does CARC code 55 mean?
Can I appeal a CARC 55 denial?
How long do I have to appeal?
InsureDefense is not a law firm, insurer, medical provider, or claims adjuster. We do not provide legal, medical, or insurance advice. We prepare appeal documents based on the information you provide. We do not guarantee approval, payment, coverage, or reimbursement. For urgent medical situations, contact your doctor, insurer, or emergency services directly.