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PA is Physician's Assistant, C means he is certified, and the MS means he holds a master's degree. I would think this person is well qualified to give most medical advice. He would work directly under a physician and report to him. JuliusHere Â· 9 years ago.
A physician assistant (PA) practices medicine under the direction of a physician. As members of healthcare teams, PAs: 1  take medical histories, 2  examine and treat patients,3  make diagnoses, 4  prescribe medications, 5  assist in surgery, 6  counsel patients and. physician assistant (PA) practices medicine under the direction of a physician. As members of healthcare teams, PAs: 1  take medical histories, 2  examine and treat patients, 3  make diagnoses, 4  prescribe medications,