However all the nurse and doctors I work with in my hospitals ER have told me any person over the age of 18 and of sound mind and body can refuse treatment and sign themselves out.
Believe me if you're not in any imminent life threatening situation or are a threat to yourself or anyone else they'd be happy to discharge you and move on to the next patient. In every hospital ER and in every room of every hospital is a large sign called a "Patients Bill Of Rights''. Not to pry or cast aspersions at you but what was the name of this hospital and why didn't you want to go there?
Imminent, life threatening situation is a subjective term, ESPECIALLY when not even a blood test had been done. I didn’t want to go with the EMTs and they forced me as I passively resisted. IOW, they did all the man-handling and grabbing.
County government EMTs, frigging rural county Piedmont Hospital that spent all its money on ways to bill everything more efficiently. Once there they saw I had Medicare and a top-of-the-line Plan F supplemental Part B policy from BCBS and they milked it for all it was worth. I made them print me out a bill immediately after release and it was over 200 pages - double sided. Did everything under the sun that a simple blood test could have determined.