Insurance Retroactively Unapproved A Surgical Procedure 8 Months Post-op, And Now I'm On The Hook For ~$90k That Was Supposed To Have Been Covered The Entire Time. What Are My Options?

Location: Wisconsin, United States of America.

(I hope I picked the right flair. I've never really needed legal advice before. Also, I'm using an alt I made years ago because I'm about to go into more detail about my location than I usually do and don't want it linked to my usual username. Hope that's okay!)

In April of 2025, I (25 at the time) underwent a double mastectomy. The year leading up to this was spent seeing specialists, getting letters of approval from my primary doctor and all the specialists I wound up seeing, and ensuring that the insurance I had at the time would cover the procedure, since it was extremely medically necessary. Only once all my ducks were in a row did I go under the knife. Recovery went well, and my quality of life has significantly improved since the procedure.

This past January (January of 2026), I was informed through a balance update email from LiveWell (and only a balance update email from LiveWell, as far as I can remember) that I owed the hospital the entirety of the cost of the procedure. For the months since, I've been somewhat paralyzed in the metaphorical sense, just from the horror of potentially being on the hook for more money than I've ever made before in my entire life. However, I've recently been informed that hospitals don't do major procedures like mine unless everything is in order first, which means that the sudden unapproval shouldn't have happened.

When asking the insurance company what was going on, they claimed that coverage of my surgery was denied on the basis of my "diagnosis." For the purposes of anonymity, I don't want to say exactly what my diagnosis was, but I will say that, unlike most double-mastectomy patients, the active presence of cancer was not a factor. However, every medical professional I saw was in agreement that it was a procedure I needed to undergo for my own health, not just some sort of cosmetic thing with no bearing on my actual well-being. Anybody with a brain would agree upon looking at the "before" photos the specialists took of my chest.

Is there any reason they would have waited until well after the procedure to actually deny coverage? Can I fight this? Are there any specialized kinds of attorneys I should look into? With the overlap between double mastectomies and the rare transgender individual who is able to afford their own, is it possible that this is technically legal in the transphobic federal government we currently have? (I really hope it's not that last one.)