Hollynn P. Knight, DO: Internal Medicine Looking for a new doctor? A Our new internal medicine physician is ready to focus on you. 412-466-5502 | doctors.AHN.org/Hollynn-P-Knight Hollynn P. Knight, DO: Internal Medicine Looking for a new doctor? A Our new internal medicine physician is ready to focus on you. 412-466-5502 | doctors.AHN.org/Hollynn-P-Knight