Apologies if this posts twice, first one "authentication failed."

My 91 year old mother-in-law lives in an independent living facility near us. She is having a partial knee replacement in January. She needs a cane or walker to get around and can walk up one step, maximum. She does not have a driver's license. Talking with the doctor's nurse yesterday, I was informed that she is ineligible to receive home physical therapy after surgery (but will need PT 3 times a week for 6 to 8 weeks). The nurse said that: not driving is not a criterion, she can take a ride share; this is elective surgery so she can't have in-home PT; she "does not qualify for that level of ". I looked at the Medicare handbook, as did she, and we are interpreting this differently! Also just had a friend with a knee surgery get in-home PT so not sure what to do next! Any thoughts on how to pursue this? This is a well-known surgical center and I've had friends (younger) who have gone there with no problems; we like the doctor. Thanks.