Navigate Up

Trauma and Fracture Care Experts

Lisa R. Blackrick, MD
An assistant professor in the Division of Trauma in the UPMC Department of Orthopaedic Surgery, Dr. Blackrick has special clinical interests in acute fracture care, fracture nonunion/malunion, limb salvage/reconstruction, and pelvic and acetabular reconstruction. After receiving her medical degree from Case Western Reserve University of Cleveland, she completed a residency at UPMC, followed by a fellowship at MetroHealth Medical Center/Traumatology in Cleveland. Currently, her research interests focus on functional outcomes after fracture care.

Andrew R. Evans, MD
Dr. Evans is an assistant professor of orthopaedic surgery in the Division of Orthopaedic Traumatology at UPMC. Dr. Evans is board-certified by the American Board of Orthopaedic Surgeons (ABOS), and is trained in the subspecialty of orthopaedic traumatology. His orthopaedic trauma practice is based mainly at UPMC Mercy, but he also has operating privileges at UPMC Presbyterian, UPMC McKeesport, and Children's Hospital of Pittsburgh of UPMC (CHP).  He is active in the orthopaedic residency training program at the University of Pittsburgh. Dr. Evans earned his medical degree from Loyola University Chicago Stritch School of Medicine in Maywood, Illinois, and completed a residency in orthopaedic surgery at SUNY Upstate Medical University in Syracuse, and a fellowship in orthopaedic traumatology at the University of Washington's Harborview Medical Center in Seattle.

Gary S. Gruen, MD
A professor of orthopaedic surgery in the Division of Orthopaedic Traumatology at the University of Pittsburgh, Dr. Gruen is a board-certified orthopaedic surgeon who specializes in orthopaedic surgery, with a sub-specialty in orthopaedic trauma. His expertise is in the area of fracture management, non-unions, as well as pelvic fracture surgery. He received his medical degree from Temple University School of Medicine in Philadelphia, followed by two residencies—one at the University of Pittsburgh Medical School and another at Drexel University College of Medicine in Philadelphia—and a fellowship at the University of Washington in Seattle (Harborview). Dr. Gruen has published over 60 papers in peer review journals as well as lecturing to orthopaedic surgeons throughout the world.

Peter Allen Siska, MD
Dr. Peter Allen Siska specializes in hip and knee surgery, as well as orthopaedic trauma and adult reconstriction. He held both his residency and fellowship at the University of Pittsburgh School of Medicine and has published articles on methods to decrease postoperative blood transfusions in spinal surgery patients, and the role of ultrasounds in fracture healing.  Hospital affiliations include Magee-Womens Hospital of UPMC, UPMC Mercy and UPMC Presbyterian.

Ivan S. Tarkin, MD
Chief, Division of Orthopaedic Traumatology

A board-certified orthopaedic trauma surgeon at the University of Pittsburgh, Dr. Tarkin has authored an impressive number of publications, and has been awarded numerous grants for his research in the area of orthopaedic fractures and injuries. He also received the University of Pittsburgh “Outstanding Clinical Educator of the Year” Award in 2011, and a Golden Apple award in 2010.

Dr. Tarkin attended medical school at SUNY Buffalo in New York State, where he earned his degree. He completed a residency at Creighton University/University of Nebraska Medical Center in Omaha, followed by a prestigious orthopaedic trauma fellowship in Minnesota.

©  UPMC | Affiliated with the University of Pittsburgh Schools of the Health Sciences
Supplemental content provided by Healthwise, Incorporated. To learn more, visit

For help in finding a doctor or health service that suits your needs, call the UPMC Referral Service at 412-647-UPMC (8762) or 1-800-533-UPMC (8762). Select option 1.

UPMC is an equal opportunity employer. UPMC policy prohibits discrimination or harassment on the basis of race, color, religion, ancestry, national origin, age, sex, genetics, sexual orientation, gender identity, marital status, familial status, disability, veteran status, or any other legally protected group status. Further, UPMC will continue to support and promote equal employment opportunity, human dignity, and racial, ethnic, and cultural diversity. This policy applies to admissions, employment, and access to and treatment in UPMC programs and activities. This commitment is made by UPMC in accordance with federal, state, and/or local laws and regulations.

Medical information made available on is not intended to be used as a substitute for professional medical advice, diagnosis, or treatment. You should not rely entirely on this information for your health care needs. Ask your own doctor or health care provider any specific medical questions that you have. Further, is not a tool to be used in the case of an emergency. If an emergency arises, you should seek appropriate emergency medical services.

For UPMC Mercy Patients: As a Catholic hospital, UPMC Mercy abides by the Ethical and Religious Directives for Catholic Health Care Services, as determined by the United States Conference of Catholic Bishops. As such, UPMC Mercy neither endorses nor provides medical practices and/or procedures that contradict the moral teachings of the Roman Catholic Church.

Pittsburgh, PA, USA