It says “no oxygen since initial hospitalization”. That’s a 24 hour period. Hospital days are measured from time of arrival, the first day usually referred to as “observation”, unless the patient was a “direct admit”, as the president most likely was, but that doesn’t keep that first 24 hours from being the “initial hospitalization”. (All set up by Medicare and insurance companies, because some Medicare or insurance benefits are determined by whether a patient is an “admit” or an “observation patient”)
If rules have changed since I’ve retired, let me know.
they never were what you state. some people are observation status and remain that way throughout their stay. Others are admitted (inpatient) from the beginning. The term direct admit means they were admitted to the hospital without coming in through the ER which would be true of the presidents admission this time. A direct admit can either be inpatient or observation. as well. There is no official term initial hospitalization and therefore no formal timeframe associated with it