The Privacy Rule defines PHI as individually identifiable health information, held or maintained by a covered entity or its business associates acting for the covered entity, that is transmitted or maintained in any form or medium (including the individually identifiable health information of non-U.S. citizens).
Ketamine (Ketalar) is a dissociative general anesthetic that has been available by prescription in the U.S. since the 1970s for human and veterinary uses. It has also been used for pain control in burn therapy, battlefield injuries, and in children who cannot use other anesthetics due to side effects or allergies.
Today, there are still valid medicinal uses of ketamine for anesthetic reasons, though use is uncommon and tightly restricted. Illicit use today is also of great concern to many. Despite difficulty in determining its prevalence, use is higher today than it was when first introduced.