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The Saint Vincent faculty members bring many years of experience and expertise to the residency program, and each of them has diverse special interests essential to a comprehensive family practice education. In addition to being professional educators, faculty members maintain clinical practices, adding practical experience to their well-rounded academic background. All of our faculty are board certified and committed to preparing you for a successful practice.

Hisham Abusamhadana, MD

Dr. Abusamhadana earned his medical degree at Al-Tahadi University (Sirte University Faculty of Medicine) in Sirte, Libya. Dr. Abusamhadana completed his training at Ibn-Sina Teaching Hospital in Sirte, and Saint Vincent Hospital. He oversees the pediatric and obstetrical experiences at the Family Medicine Center. He has an interest in women’s health care, including obstetrics and gynecologic procedures. He enjoys house call visits and other community work.

Dorothy Candib, MD

Dorothy Candib, MD, is Director of Geriatric Education. She was born in Montreal, Canada and attended Vassar College. She received her medical degree from McGill University. After completing her internal medicine residency at the Montreal General Hospital, she served as Chief Medical Resident at Montefiore Hospital, University of Pittsburgh. She is board-certified in Internal Medicine by the ABIM with a Certificate of Added Qualification in Geriatric Medicine. Her areas of interest are care of the frail elderly, long-term care, and hospice care. Her personal interests are cooking, reading and traveling, hiking and biking in summer and cross-country skiing in winter.

Caitlin S. Clark, DO
Program Director

Caitlin S. Clark, DO, is a native of Annapolis, Md. She received her Bachelor of Science in biology from Villanova University. She attended the Philadelphia College of Osteopathic Medicine. She completed an internship at Geisinger Medical Center and graduated from the Saint Vincent Family Practice Residency Program. She has an interest in women’s health care, including obstetrics. Her personal interests include running and spending time with her family.

Kathleen A Costanzo, DO

Doctor Costanzo practiced physical therapy for eleven years before deciding to pursue a career in medicine.  Her path led her to Osteopathy and she matriculated from LECOM in 2006.  She completed her Family Medicine Residency and Sports Medicine Fellowship at Saint Vincent Hospital in Erie, Pennsylvania. After completing training, she devoted the next six years to practice as a Primary Care Sports physician for Wellspan Orthopedics in York, Pennsylvania.  There she honed her orthopedic skills and provided medical coverage for a wide range of amateur and professional sports teams. She is a team physician for USA Weightlifting and has traveled to Wroclaw Poland and Tibilesi Georgia to cover the Junior World Championships in addition to acting as medical director for several National Weightlifting events. She returned to Erie in 2016 to assume a role as faculty for Saint Vincent Family Medicine Residency. She serves as the key faculty member for SVFM Osteopathic Recognition and education within the family medicine residency. Her free time is spent traveling enjoying a variety of cultural experiences and international cuisines.  She enjoys hiking and kayaking.

Joshua Czerwinski, DO

Dr. Czerwinski earned his medical degree from Lake Erie College of Osteopathic Medicine (LECOM) and completed his family practice residency and internship at Saint Vincent Health Center. He is currently faculty at Elk Valley Medical Center.

Dr. Czerwinski enjoys competitive running and is an avid Cleveland sports fan. He is also an Eagle Scout, which explains his love for a variety of outdoor activities including hunting, camping and fishing.

Dawn Karns, DO

Dawn Karns, DO is a native of northwestern Pennsylvania. She graduated from Allegheny College with a degree in biology. She then earned her medical degree at Des Moines University College of Osteopathic Medicine in Des Moines, IA. She completed residency at Saint Vincent Family Medicine Residency program where she served as Chief Resident in her final year. Her special interests include outpatient procedures, pediatrics, women’s health and resident wellness. Dr. Karns is married and has 3 children. She enjoys spending time with her family, traveling, creative endeavors and a variety of outside activities.

Jeffrey Kim, DO

Jeffrey Kim, DO, serves as Family Medicine Faculty as well as clinical faculty member of the Primary Care Sports Medicine Fellowship Program. He is trained and board certified in both family medicine and primary care sports medicine. In addition to his faculty and clinical responsibilities, he serves as the team physician for Penn State Behrend, Fairview High School and Northwestern High School. Dr. Kim is a graduate of Marquette University’s College of Engineering and the University of New England College of Osteopathic Medicine. Dr. Kim originates from Pittsburgh and has lived in Erie for the past eight years. He enjoys the challenge and excitement of teaching residents and fellows, and has a strong interest in primary care sports medicine. 

Laura McIntosh, MD

Laura McIntosh, MD, is the Program Director of the Saint Vincent Primary Care Sports Medicine Fellowship. Dr. McIntosh earned her medical degree from the University of Pittsburgh School of Medicine, completed her family practice residency at UPMC Shadyside Hospital in Pittsburgh, Pa., and completed her sports medicine fellowship at Saint Vincent. She also specializes in diagnosing and managing concussions. Dr. McIntosh is the team physician for Gannon University. She provides medical coverage for several local athletic events including the Highmark Quad Games, Erie Rugby Tournament, Presque Isle Triathlon, and the Barber Center Beast on the Bay.

Timothy D. Pelkowski, MD
Assistant Program Director

Timothy D. Pelkowski, MD, is a native of Erie, Pa., and is the associate director for the Saint Vincent Family Practice Residency Program. He earned his medical degree from Case Western Reserve University in Cleveland, Ohio. He completed his family medicine residency in 2000 with the Saint Vincent Family Practice Residency Program. He then completed a fellowship in primary care sports medicine from Saint Vincent in 2001. Prior to becoming a faculty member, he was in private practice for 10 years. Dr. Pelkowski is the residency’s director of scholarly activity and is involved with medical student education, the Erie County Medical Association, and his function as the clinical coordinator of the Northwest Pennsylvania Area Health Education Center. He is married to his wife Cassie, and they have three children. His personal interest includes swimming.

Phillip St. Julien, DO

Dr. St. Julien earned his medical degree at Lake Erie College of Osteopathic Medicine (LECOM). He completed his residency in Family Medicine and his fellowship in Sports Medicine at Saint Vincent Hospital. He is a member of the American Academy of Family Physicians, Pennsylvania Osteopathic Medical Association and the American College of Sports Medicine. Dr. St. Julien serves as the team physician at Edinboro University and Northwestern High School.

Dr. St. Julien is originally from Watkins Glen, New York but currently resides in Erie with his wife and four children. He enjoys spending time with his family, home improvement projects and golfing in his free time.

Lisa Treusch, MD

Lisa Treusch, MD, graduated cum laude from Grove City College. She earned her medical degree from Northeastern Ohio Universities College of Medicine in 1992 and served as chief resident while completing her family medicine residency at Saint Vincent Health Center. Dr. Treusch has been in practice at Elk Valley Medical Center since 1995. She is active in her church as a Bible study leader and enjoys spending time with her husband and two children doing outdoor activities such as backpacking, biking and cross country skiing.