Insurance denying extra night stay at hospital following spine surgery

A week after spine surgery at an in-network hospital by an in-network surgeon, I received a letter from Anthem BCBS stating that my additional hospital night stay as inpatient was denied based on reasoning hospital provided and I could appeal if I wanted.

Originally everything was approved as outpatient but surgeon kept me an extra night due to some complications during the surgery (bone infection was discovered and treated). So my stay was two nights total instead of just one which was originally approved (inpatient instead of outpatient). I was literally freaking out the first night when they mentioned they would keep me for another night to observe me and administer infection treatments and multiple other medication through IV. They would not let me leave till doctor and hospital discharged me. The hospital assured me multiple times (including their billing director) that they would get all prior authorization from insurance. I am so upset that even with all my due diligence and planning to ensure an insurance hiccup did not happen, it actually did.

Will they try to bill me for this if insurance denies the extra night, which looks like they have? What is my best course of action here? Should I contact the surgeon, hospital, insurance or all of the above to raise hell? Is it even my responsibility as a patient to sort this out? Has this happened to anyone?

Any guidance will be greatly appreciated.

submitted by /u/Due_Pass_2608
[comments]