Your deadline
At least 180 days from the day you RECEIVED the denial to appeal internally. Gathering evidence takes time, so start the appeal before you finish collecting it.
This is not everyone’s clock. Medicaid or CHIP, Medicare, TRICARE, VA health care and a church or government employer plan run on different rules. Do not assume the number above is yours.
Work out your own deadlineWhat to do
Get the plan's definition of experimental
Every plan document defines the term, usually with criteria such as regulatory approval, peer-reviewed literature, and acceptance in the relevant specialty. Read it before writing anything.
Test the procedure against each element of that definition
This is where the denial usually falls apart. The procedures have decades of literature and are described in the recognized standards of care.
Point at Medicare's own history
Medicare's blanket experimental exclusion is gone, and the sequence matters if you cite it. The 1989 national coverage determination (NCD 140.3) called the surgery experimental. That exclusion was invalidated in 2014 by a decision of the HHS Departmental Appeals Board. CMS then ran a national coverage analysis and issued NCD 140.9 in 2016, concluding that no national determination was appropriate and leaving the decision to local contractors case by case. So a plan calling the procedure experimental in 2026 is out of step with the federal payer — but the document that removed the exclusion is the 2014 Board decision, not NCD 140.9.
Have your surgeon speak to acceptance in the specialty
Case volume, training pathways, and specialty society positions all go to whether the procedure is accepted, which is usually an explicit element of the definition.
Go to external review
Independent reviewers apply the plan's definition to the actual literature, which is exactly the ground this denial is weakest on.
Why this denial is often a misclassification
Experimental denials tend to appear where an insurer has no specific policy for a procedure and reaches for a general exclusion. Ask which clinical policy was applied. If the answer is that none exists for this procedure, that is itself the point: an absent policy is not evidence that care is investigational.
Common questions
- Is gender-affirming surgery experimental?
- Not by the criteria plans themselves use. The procedures have long clinical histories, established literature, and specialty acceptance, and Medicare's own blanket exclusion was invalidated in 2014 and has not been reinstated.
- What if a specific technique is genuinely newer?
- Then separate it out. Appeal the established procedures on their own record rather than letting one newer element characterize the whole surgical plan.
Where to go next
Sources for the legal points on this page
- Medicare sets no national criteria — and no national exclusion either
Federal — Medicare · effective NCD 140.9 effective 2016-08-30, still in force
NCD 140.9, Gender Dysphoria and Gender Reassignment Surgery (CMS Pub. 100-3), effective 2016-08-30, no end date; Transmittal 194 / CR9981
Status: settled · source-checked 2026-08-06 · primary source verified: 2026-08-06
Also on this page, without a citation yet
- The 2014 Departmental Appeals Board decision itself. It is named here because it is the document that actually removed Medicare's experimental exclusion and it is the right thing for an appeal to cite — but the docket and decision number were NOT verified: DAB decisions are published by HHS rather than in the Federal Register or the CFR, which is the corpus this site checks against. NCD 140.9 IS verified and supports the different point that no national determination exists. Look up the Board decision before you put a number in a filing.
These are specific and checkable and we have not yet checked them against a primary source. Treat them as a starting point rather than as settled, and do not put them in an appeal without confirming them.