(I was typing this when TCABM responded above)
I, too, am not trying to be argumentative in this reply and will try to illustrate. Please remember I've never been an AME and it's been over 25 years since I was an active AF Flight Surgeon. I may get some AME details incorrect and am happy to be corrected.
Let's say I've been TCABM's AME for a long time and when he shows up this time with no reported changes since his last Class 3, I notice a very suspicious mole on his arm. Although I'm really worried about its appearance, since it doesn't appear to interfere with his ability to fly, I sign off his Class 3 AND advise him to see his regular PCM or, if his insurance covers it, see a dermatologist. I don't write the consult and don't plan to see him back to follow up on the mole but I tell him of my serious concern it may be a melanoma. I didn't biopsy it to confirm diagnosis, I didn't initiate treatment, and I didn't arrange follow-up for it. I did not practice medicine: I assessed his fitness for flying.
Let's say TCABM and I are both still on Active Duty and I'm his Flight Surgeon. He comes in for his flight physical and I see the mole. I still sign off the flight PE (since, at the moment, there's nothing to endanger his mission performance) but I also refer him to Derm and arrange follow-up with me. If Derm does a biopsy and it's normal, we're done. If they discover it's a melanoma that has spread and chemotherapy is warranted, I need to ground him during treatment and reassess his ability to do his Flight-rated job. In my capacity as his PCM I had the mole evaluated, oversaw treatment, and was following up. I was practicing medicine.
In the OP, the physician evaluating the ocular hypertension was practicing medicine: they were making a diagnosis, arranging appropriate treatment, and following the patient. They also messed up the paperwork, which caused the particular issue (as an aside, this snafu shouldn't be happening in a time of electronic medical records and constant checks of names/birthdates at every step of the process but it does (I'm speaking as a former hospital "surveyor")). OKC was trying to assess paperwork they received indicating the individual had cognitive impairment and seizures. The AME was sorting out the paperwork snafu for the OP. Neither of the last two were actually making diagnoses themselves, treating the patient, or following the condition. That's why I say they're not practicing medicine.
As I said, I'm open to the possibility I'm off the mark re AME stuff but I'm pretty sure it's close.
HTH