My husband recently had to have unplanned hip replacement after fracturing his upper femur due to a fall. Hospital referred him to a facility for inpt rehab and the pre certification was denied by our Medicare advantage insurance company. Hospital and receiving facilty were both astounded at the denial, as hubby has other complicating factors potentially impacting rehab, so it's not a simple case. We are of course appealing the denial. In the meantime we did manage to get him transferred to a SNF (skilled nursing facility) where he's making great progress. We are "self pay", but fortunate to have long term care insurance insurance that is willing to pay for the stay though not for the therapy services. If successful in our appeal, the Medicare advantage plan will pay retroactively to admission date. We are more fortunate than others in having the LTC insurance, but we hate to have to use it when Medicare should be paying. I suspect if we had traditional Medicare they would not have denied the rehab stay.