Patient Portal. Our Physicians. Adam J. Grunbaum, D.O., F.A.C.O.I., F.A.C.R. Dr. Grunbaum is board certified in Rheumatology and Internal Medicine. He received his medical degree from Nova Southeastern University in Davie, Florida. He then completed his Internal Medicine residency at Sun Coast Hospital and Rheumatology fellowship at Largo ....