This is what you get back.

Four representative letters and the decode you’d get back for each — what happened, what it means, the deadline that matters, and the reply we draft for you to review.

The letter
Explanation of Benefits — this is not a bill
Claim 4471-0092 · DOS 03/14/26 · Ridgeline Imaging Associates

Services rendered on the above date of service have been adjudicated and are not payable under the terms of the member’s certificate of coverage. The requested service does not satisfy the criteria for medical necessity as set forth in clinical policy bulletin MP-2211. Member may be responsible for billed charges in the amount of $2,340.00. This determination may be subject to reconsideration upon receipt of additional documentation within the timeframe specified in your plan documents.

Composite examples. No real person’s letter is reproduced here.
The decode
What happened
Your insurer refused to pay for the MRI you had on March 14. They say the $2,340 is yours.
What it means
“Not medically necessary” is one reviewer’s opinion applied to a written policy. It is reversible, and a letter from your doctor is the thing that reverses it.
Your deadline
180 days from the day you received this denial to file an internal appeal — so the notice date on the letter is the one that matters, not the date of the MRI.
What to do
File the internal appeal and ask your doctor’s office for a letter of medical necessity referencing MP-2211. Do not pay the bill while the appeal is open.
The response letter, drafted

“I am requesting an internal appeal of the denial of claim 4471-0092. The denial cites clinical policy bulletin MP-2211. Under that bulletin, imaging is covered where conservative treatment has failed over six weeks, which my records document. I request a copy of the reviewing physician’s credentials and specialty, as provided under 29 CFR 2560.503-1.”

Decode my letter freeYou edit it before anything is sent.