Hi Kap,
The one that you're referring to (Plastic surgery) is a completely different guy. Yes this younger guy had issue and he is not an approved DME.
The approved Medical Examiner (FAA, EASA, CASA, CAAS etc) is Dr. Firdos Medora, quite an old guy. Make sure the clinic address is the one at Upper Paya Lebar Road. This guy is good, i have been visiting him for over a decade. I used to renew 2 licences in one go