Jennifer M. Rittenhouse-Puhak, MD Jennifer M. Rittenhouse-Puhak, MD, is a surgeon with AHN Surgery Institute, specializing in general surgery. She applies best-practice techniques and procedures to help ensure long-term patient outcomes. She went to medical school at Temple University in Philadelphia, Pennsylvania and did her residency at Allegheny Health Network in Pittsburgh, Pennsylvania. Dr. Rittenhouse-Puhak is certified by the American Board of Surgery. She sees patients ages 18 and older.