How do you know when you need an internal medicine Dr. instead of a family physician? What's the difference? I have been diagnosed with: depression, ocd, fibromyalgia, OA, copd, "severe" sleep apnea(stop breathing 100 times an hour), high blood pressure, and gerd. I'm a 61 yr. old female. I regularly see a: phyciatrist, rheumatologist, pulmonary Dr., and physician's assistant. Should I switch from the PA to a Dr. of internal medicine?