My father had TKR a couple months ago and he was sent to a rehab/nursing home for 2wks when he left the hospital. (same situation, could not care for himself) After that, he had a Visiting nurse come everyday for 1 wk, and therapy at home until he could drive himself to therapy. This was in MA, so I don't know what the coverage is in PA?
(he is on Medicare, but has a supplemental INS he pays for himself) Sorry I couldn't be anymore help.