Yes I do especially when explaining DH's medical history to the likes of A&E doctors who are encountering him for the first time. He also has a thick folder divided into the various areas of his illnesses whichnI tend to have on me firbthe medical details.
I can't remember what exactly I said but on one occasion a rather sneery junior doctor asked if I was "training to be a doctor" he got the look otherwise known as Mum's death stare, and the reply that No, but I had lived with DH's problems for 30'years and was quite familiar with the terminology.
But seriously, for all he knew I could have been a (retired) doctor, surgeon, pharmacist, whatever!
Blooming cheek!