Earlier quoted context omitted.
Happens in doctors offices too. Now I try to request all paperwork in advance so I can read. At one (where I thought highly of the doctor who seemed very kind and competent), 2 people in the front office insisted to me that the "other document" to which the main one referred and said I was also agreeing was the same document that had the reference. After I refused to sign, one left and the other made a phone call to…
Last time I went to urgent care/the ER, I was told to sign an electronic pad repeatedly, and no document was provided at all, on paper or screen. It was just verbal, sign for this, sign for that.
Once when at a nearby hospital to just get a blood sample drawn, the documents to sign including those by reference were ~11 pages. Fortunately they weren't busy, & I tried to apologize for taking so long & explained I felt it was a matter of honesty to know what I was agreeing to, and they printed things for me and let me cross some of it out. But I found that another nearby hospital system (a regional nonprofit w/ good reputation) had a 2-page agreement, and I go there now even though it is slightly farther for us. (It unfortunately seems like on medical stuff, it helps to get as much as possible covered before the visit, also for financial questions, making sure everyone is in-network etc etc, so I am now trying to remember to ask for everything in advance sometimes.)