I also don't find this odd. I have experience working in clinics--medical and dental. These days the practices can be huge and you rotate. Or, seeing a dentist twice a year, you wait for the reminder card to come in the mail. I took many calls from caring parents who wanted to schedule appointments with "the Dr. she saw last time" for instance.
I know many here can recite by heart all of this stuff, but it is normal not to have it right in your head. When I signed my daughter up for girl scouts I couldn't remember her pediatrician's name and had to give it the next time for the paperwork. Of course, I had it on file. My daughter goes once a year for a check-up and a couple extra times for (thankfully) minor things.