I returned this morning from Croatia, and it was wonderful again! But it it is to be regretted that I was there while Jean's trip to Germany! I hope you'll write more about it!
I found a letter of the NARA in my postbox with the red cross report about the hospital! While the visit in May 1944 there were inly two Americans in the hospital, George Fulton and Robert Kritzner. The name of the head physician is also mentioned: Oberstabsarzt (head surgeon major?) Dr. Smeeds - is this the name you have been looking for, Jean? Attached the two main pages.
I also got an answer of the archbishop's archive in Cologne. They have about 30 files about the hospital in the abbey, mst of them can be looked at at the archive in Cologne, only 9 files with personal personnel data are confidential. There are also two cassettes of 1991 with reminiscences of former inmates of the hospital which will be digitizes this month and then they are also accessible.
Christoph