Hi Groundzero,
Based sa list provided to my cousin, there are 4 accredited docs here. One doctor's clinic is situated inside the hospital, while the rest are in the building across the hospital (these doctors are under Nationwide Health Systems Davao, Inc.). Iirc, my cousin's doctor was the one inside the hospital but when the time came for vaccinations, they were still instructed to visit the other accredited doctors to get their shots that's why they suggested that I choose any of the three doctors in the other building to avoid the hassle of going to and from both buildings.
So I'll probably go for Nationwide Health Systems for the convenience, since price wise, its pretty standardized i think...