Aaron S Hellman, PA-C

Andrew Waligora, MD is an orthopaedic surgeon with AHN Orthopaedic Institute, specializing in adult reconstruction. His primary specialties are primary revision hip and knee replacement surgeries. He is skilled at robotic partial and total knee replacement and complex hip and knee replacement surgeries. Dr. Waligora went to medical school at Drexel University College of Medicine in Philadelphia, Pennsylvania. He did his residency at University of Florida Health Shands Hospital in Gainesville, Florida and his fellowship in adult reconstruction at Virginia Commonwealth University Medical Center in Richmond, Virginia. Dr. Waligora is certified by the American Board of Orthopaedic Surgery and is affiliated with the American Association of Hip and Knee Surgeons. He focuses on comprehensive adult reconstructive care that includes a shared decision-making process to identify which treatment or procedure best serves each patient. Dr. Waligora welcomes patients ages 14 and older.

Mark Wilson, PA-C, is a physician assistant with AHN Orthopaedic Institute. His clinical interests include hip and knee pain and osteoarthritis. He is skilled at joint injections, wound care, suturing, cast and splint application and removal, and joint aspirations. He received his Bachelor of Science in Biology from Gettysburg College in Gettysburg, Pennsylvania and his Master of Health Science from Lock Haven University in Lock Haven, Pennsylvania. Mr. Wilson is certified by the National Commission on Certification of Physician Assistants and is certified in Basic Life Support. He follows a patient-centered care model, listening carefully to the needs and goals of each patient. Through this philosophy, he works toward helping each person achieve optimal outcomes based on an individualized plan. He sees patients ages 18 and older.

Dr. Greco is an orthopaedic surgeon with fellowship training in hand and upper extremity surgery. He offers comprehensive orthopaedic care for the upper extremity, including hand, elbow, and shoulder procedures. He has clinical proficiency in hand procedures such as carpal tunnel, trigger finger, arthritis, joint replacement, peripheral nerve injuries, tendon-ligament injuries, as well as management of fractures.A native of Wheeling, West Virginia, Dr. Greco earned his undergraduate degree at West Virginia University with a bachelors in science in Biochemistry. After graduating suma cum laude, he continued his education at West Virginia University School of Medicine. He completed his residency with Allegheny Health Network (AHN) in Pittsburgh, Pennsylvania.Dr. Greco went on to complete additional training with a fellowship in hand and upper extremity surgery at Wake Forest Baptist in Winston-Salem, North Carolina under the mentorship of Drs. Andy Koman and Zhongyu Li.Dr. Greco has presented research across the U.S. and internationally. He is a published author in multiple medical journals, as well as two book chapters on hand and elbow injuries. As an attending surgeon with AHN, he is currently involved with academic research and education of residents and fellows. Dr. Greco lives in the Greater Pittsburgh area with his wife, Sallie, son, Victor Anthony, and their beagle, Taco. In his spare time, he enjoys outdoor activities such as fishing, hiking, biking, as well as Pittsburgh professional sports and West Virginia University athletics.