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Our Residents

Residents of the General Surgery Program are as follows:

Michael Brozik, M.D.
Myungwon Chang, M.D.
Christopher Cox, M.D.
Benjamin Davies, M.D.
Eric Davies, M.D.
Zaynoun El Khoury, M.D.
Daniel Felling, M.D.
Monica Jacobus, M.D.
Theodore John, M.D.
Shepard Peir Johnson, M.D.
Chris Kaoutzanis, M.D.
Crystal Kavanagh, M.D.
Edward Kreimier, III, M.D.
Christopher LaFond, M.D.
Stefan Leichtle, M.D.

Talya Lorenz, M.D.
Thomas Martin, M.D.
Abby Navratil, M.D.
Sylvester Paulasir, M.D.
Katie Petrin, M.D.
Caleb Schroeder, M.D.
Olabisi Sheppard, M.D.
Kristen Spoor, M.D.
Thomas Stark, M.D.
Tom Thornton, M.D.
Aela Vely, M.D.
Alan Vorst, M.D.
Jeffrey Walker, M.D.
Emily Wilczak, M.D.

Michael Brozik, M.D. - Michael was born and raised in Madison, SD, a small town of just over six thousand people. He graduated from South Dakota State University in 2007 with a B.S. in Biology. After graduation, he attended medical school at the Sanford School of Medicine at the University of South Dakota, where he graduated in 2011. In his free time, he enjoys golfing, watching movies, spending time with friends, brewing beer, and trying new foods with his longtime girlfriend Elise. He is still undecided about his future plans, but is considering a possible fellowship in either trauma/critical care or colorectal surgery. 
Myungwon Chang, M.D. - Myungwon grew up in Ann Arbor, MI. She attended the University of Michigan where she completed her B.S. in Cellular Molecular Biology and Masters in Public Health degrees. She then went on to earn her M.D. from Wayne State University. In her spare time, Myungwon enjoys spending time with her husband and running half marathons with her family. If you can't find her at the hospital she'll probably be at the local figure skating rink or enjoying delicious Korean food at her dad's restaurant.

Christopher Cox, M.D. - Christopher Cox grew up in Logansport, IN. After high school graduation, he entered the US Navy and was fortunate enough to live in Naples, Italy for three years. Upon fulfilling his obligation there, he returned to Indiana and earned his B.A. and M.S. degrees in biology from Indiana University-Purdue University in Indianapolis followed by his M.D from Indiana University. Now he is honored to be able to learn from and serve the people of St Joseph Mercy. His long-term plans in surgery are still undecided, but may include a critical care/trauma or vascular fellowship.  Chris’ two greatest joys are his wife of five years and his 3 year-old son. When not in the hospital or with his family, he enjoys snow skiing, playing his guitar, and maintaining fluency in Italian.

Dr. Cox
Benjamin Davies, M.D. - Ben was born and raised in Rochester, MN. After receiving his B.S. Degree from the University of Minnesota, he moved to Boston, MA, where he continued his studies and conducted two years of Basic Science Research in Cardiology at Harvard University. Following this brief stint in the Northeast, Ben returned to the Midwest to attend Wayne State University School of Medicine, in Detroit, MI. During his second year as a medical student, he was commissioned in the United States Air Force, where he will work as a surgeon following the completion of his residency. In his spare time, Ben visits family and friends in Minnesota and Chicago. He enjoys camping, hiking and a wide variety of outdoor activities. A devoted supporter of the Minnesota Vikings, Twins and ‘all-things’ Gophers, Ben both watches and participates in sports as often as possible. He is a proud team member at St. Joseph Mercy Hospital and looks forward to pursuing his career in General Surgery. DaviesBenjamin.jpg
Eric Davies, M.D. - Eric was raised on a sheep and horse ranch on the edge of the Black Hills near Sturgis, South Dakota. He moved to Omaha, NE and attended Creighton University, where he completed a B.S. in biology, with a co-major in theology. The Jesuit focus on critical thinking, liberation theology, and selfless service inspired Eric to attend Creighton University School of Medicine to embrace a vocation of altruistic medicine and solidarity with the underserved. During medical school, he became interested in traveling to third world countries, and visited Kenya and the Dominican Republic on medical service trips. After an eye-opening trauma rotation coupled with advice from trusted mentors, Eric decided to pursue general surgery. In his free time, Eric has been very involved in his five different bands, learning multiple string instruments, and writing and recording music. Other hobbies include welding post-modern and deconstructive metal artwork, biking, skiing, farming, traveling, and continuing to build life-giving relationships with his friends and family. He is excited to move to Ann Arbor to continue his medical education, with hopes of completing the rural surgery education program, and someday returning to work in Africa. Eric Davies, M.D.
Zaynoun El Khoury, M.D. - My name is Zaynoun El Khoury. I was born in Lebanon where I spent most of my life. I joined the American University of Beirut from which I earned my BS degree in Biology and then my Medical degree. I spent an extra year at AUB in the Anesthesia and Critical Care department. After that I moved to the United States and joined the surgery department at Mayo Clinic for one year. During my time off I like to spend time with friends and eventually I hope I will return to Lebanon after I am done to practice General Surgery. Zaynoun El Khoury, M.D.
Daniel Felling, M.D. – Hometown is Belgrade, MN. Graduated from Minnesota State University, Mankato with a BS in Human Biology and a BA in Spanish. Obtained a M.S. at A.T. Still University in Kirksville, MO. Graduated medical school from the University of Minnesota. I'm married with 3 children, and enjoy spending as much time as possible with them. We enjoy all sorts of outdoor sports and activities, professional sports, and movies. Unsure where we want to end up after finishing residency, keeping all options open. FellingDaniel.jpg
Monica Jacobus, M.D. Monica grew up in Ann Arbor, her mother and father still live in town. She attended Greenhills School, graduated at 18 years old, and was eager to leave this idyllic and peaceful town, in order to go out and see the world. She received an academic scholarship to attend Tulane in New Orleans. She received a B.S. in Art History, with minors in Mathematics and Chemistry. She made the decision to enter medical school because of experiences at Hope Clinic in Ypsilanti where she volunteered each summer learning how rewarding and meaningful a life in the medical field could be. By this time, she missed her peaceful town in the Midwest and began an odyssey northward along the Mississippi River- attending Medical School at St Louis University. It was here that she fell in love with surgery, and applied and matched in Chicago for Residency in General Surgery at Metropolitan Group Hospitals. After two years of training in Chicago, she has finally arrived full-circle and is looking forward to finishing her last years of surgical training at St. Joseph Hospital at home in Ann Arbor. 
Theodore John, M.D. Ted was born and raised in sunny southern California. He moved to Houston, Texas to attend Rice University, where he received a Bachelor of Science in Bioengineering. During college, Ted developed an interest in international service by spending each of his summers in Kenya and educating youth there about HIV/AIDS. Upon graduating, Ted spent a year in Darfur, Sudan to work for a medical relief organization that provides assistance to communities affected by the ongoing civil war. He then went on to attend the University of Michigan Medical School and received his MD in 2011. In the future, Ted hopes to work in underserved communities and start a hospital overseas one day. Outside of the hospital, Ted enjoys running, playing the guitar, and traveling.

Shepard Peir Johnson, M.D. – Peir was born and raised in Champaign, IL. He comes from a family of competitive swimmers and he continued that trend when he became a student-athlete at Northwestern University. He there received a BS in Biomedical Engineering, a major that demands critical thinking and innovative design much like the field of surgery. With a desire to travel he chose to study abroad and obtain his medical degree at the University of Queensland in Brisbane, Australia. His passions include spending time with his family and athletics, particularly tennis and basketball. His family is excited to return to the Midwest, but Australia will always be the home of his firstborn. Other areas of interest include camping, hiking and travel.

Chris Kaoutzanis, M.D. - Chris was born in Athens, Greece. His family moved to the island of Cyprus when he was a child where he grew up. In 2002, after completing his higher education and the two-year compulsory military service, he moved to London, United Kingdom where he commenced his medical degree at St Georges, University of London. After the second year of medical school he took a year out to complete a Bachelor of Science degree in Anatomy. During that time he also worked in a lab investigating the role of HOX genes in the development of prostate cancer. He then continued his graduate studies and received his MD with distinction in medical sciences and merit in clinical sciences as well as two of the final year prizes in 2008. Following graduation Chris worked as a resident in London and Kent but his great experiences during clinical electives in the US solidified his desire of continuing his training and pursuing a career in surgery in the US. In his spare time, he enjoys reading, traveling and all things outdoors including playing tennis and soccer, wakeboarding and skiing. Chris Kaoutzanis, M.D.
Crystal Kavanagh, M.D. Crystal was born in Sudbury, Ontario Canada and later located to Toronto, Ontario where she earned a B.Sc. in Biology at York University. She spent several years in the city working in the financial sector before beginning medical school at Saba University School of Medicine in the Netherlands Antilles and completing the bulk of her clinical rotations in Brooklyn, NY. Prior to joining St. Joseph's Crystal completed a year of training with the department of surgery at the Mayo Clinic. In her free time she enjoys travel, international cuisine, and spending time with family and friends. She looks forward to one day returning to Canada and pursuing a career in reconstructive plastic surgery.
Edward Kreimier, M.D. - Eddie was born and raised in the small Western Colorado town of Rifle. He attended the University of Notre Dame where he earned his BS in Biological Sciences with a minor in Science, Technology, and Values. While at Notre Dame, Eddie lived in Keough Hall. He then received his MD from Michigan State University College of Human Medicine. While at CHM, he was part of the Rural Physician Program and completed his clinical rotations at Marquette General Hospital and around the Upper Peninsula. Eddie enjoys seafood, hunting and fishing, and Notre Dame Football. KreimierEdward.jpg
Christopher LaFond, M.D. - Chris was born at St. Joseph Mercy Hospital and is very excited to return to the hospital for his general surgery residency. He attended the University of Michigan for his B.S. and Masters in Public Health degrees. During a documentary trip to Uganda as an undergraduate he discovered his passion to practice medicine in low-income countries. He returned as a graduate student to study HAART in the internally displaced person camps in the north of the country. For medical school he found the perfect fit with the Medical School for International Health, a collaboration between Ben-Gurion University in Israel and Columbia University, Here he gained valuable community health skills during the three years he spent in Israel. Despite the two wars during this period Chris completed public health projects in Ethiopia, Kenya, Tel Aviv, Manhattan. After residency Chris plans on returning to low-income countries to teach and practice surgery in displaced communities. In his free time he enjoys sailing, rock climbing, photography and pretty much any activity that takes place outdoors. Christopher LaFond, M.D.
Stefan Leichtle, M.D. Stefan attended medical school at the Universities of Erlangen-Nuremberg and Munich in Germany. Before joining the surgery residency program at St. Joseph Mercy Hospital, he worked in the Neurotransplantation and Regeneration Laboratory at Yale University, studying viral vectors for gene therapy in Parkinson's disease. Stefan's interests include healthcare policy and outcomes research, and he has published and presented several of his studies involving the American College of Surgeons' National Surgical Quality Improvement Program. After residency, he intends to pursue a fellowship in surgical critical care. Outside of medicine, he enjoys biking, motorcycling, golf and traveling.
Talya Lorenz, M.D. – Talya was raised in Billings, Montana. She attended Carroll College - in Helena, Montana - where she played soccer and graduated in 2009 with a degree in Biology/Chemistry. She then earned her M.D. from the University of Washington in 2013. In her spare time Talya enjoys eating, traveling with her family, running half marathons, and escaping to the mountains with her dog. She hopes to return to Montana and pursue a General Surgery practice. LorenzTalya.jpg

Thomas Martin, M.D. - Tom grew up in Grosse Pointe, MI and earned a Bachelor’s of Science from the University of Michigan in Biology. While at U of M he spent his free time sailing on University of Michigan’s Intercollegiate Sailing Team. He competed nationally for this club sports team that is student run and student funded. He earned his MD from Wayne State University School of Medicine in 2009 and is returning to Ann Arbor for residency. He is planning a career in general surgery with a particular interest in Minimally Invasive Surgery. While not on the water or at the Hospital he enjoys all things outdoors, including hiking with his wife and two Siberian Huskies, kayaking, biking, skiing, and boating.

Thomas Martin, M.D.

Abby Navratil, M.D. Abby grew up in Bellevue, Washington. After earning her B.S. in bioengineering from the University of Washington, she went on to complete her MD at the University of Washington in 2011. In her free time, Abby enjoys reading, biking, swimming, and spending time with family and friends. She hopes to return to the Seattle area to practice as a general surgeon.

Sylvester Paulasir, M.D. - Sylvester was born in India and moved to United States with his family as a teenager. He pursued his undergraduate degree in Theology at Washington Adventist University. During the summer of his sophomore year in college he went on a mission trip to Nicaragua where he got the opportunity to volunteer at a village clinic. Touched by the need for medical attention in underserved parts of the world, he decided to become a doctor. He obtained his medical degree from Loma Linda University in California and hopes to practice as a medical missionary after residency. During his leisure time, he likes to spend time with his wife, read novels and philosophy, fly small planes and run.

Katie Petrin, M.D. – Katie grew up in Ellensburg, Washington.  After earning her B.S. in biochemistry/biophysics from Washington State University, she went on to obtain her MD at the University of Washington in 2012.   Katie and her husband, Alex are excited to be in Ann Arbor where they can spend their free time doing the outdoor activities they love – waterskiing, snowboarding, biking, rock climbing, backpacking, and anything to make their Chocolate Labrador tired.  Katie is looking forward to her career in general surgery, and at some time after residency hopes to work in a rural-based practice back in Washington State.

Caleb Schroeder, M.D. - Caleb grew up in central Nebraska. He completed his undergraduate studies at Doane College in Crete, Nebraska, where he majored in Biology and minored in History. He also enjoyed playing on the football team and participating in choir. He went on to attend the University of Nebraska Medical Center in Omaha, graduating in May 2010. In his spare time he enjoys spending time with his wife Erika, reading, the outdoors, working with horses, running and lifting weights. Caleb Schroeder, M.D.
Olabisi Sheppard, M.D. – Olabisi Sheppard was born to Mr. and Mrs. Ibitayo Lashore in the city of Lagos, Nigeria. She attended boarding school from age 10-16 and completed her Junior/Senior secondary school. She spent the next two years learning culinary arts in her mother’s kitchen. After going on to get her B.S. in Biochemistry at Northern Michigan University in Upper Peninsula of Michigan, she received her M.D. at the University of Minnesota-Twin Cities in Minneapolis, MN. She and her husband Matthew enjoy international food and travel, and they are both eager to become involved with the Ann Arbor-Ypsilanti community. Other interest includes making and eating good food, creating and listening to music, watching Doctor Who etc. SheppardOlabisi.jpg
Kristen Spoor, M.D. – Kristen Spoor is originally from Michigan. She attended Johns Hopkins University and graduated with a bachelor's degree in art history. She spent the following three years in New York City, working in orthopedics and completing a pre-medical post-baccalaureate program. She returned to Michigan to attend Michigan State University's College of Human Medicine, where she graduated in 2012. She enjoys being outdoors, biking and spending time with her family and friends. Dr. Kristen Spoor
Thomas Stark, M.D. - Thomas Stark was grew up in Pelkie, Michigan and graduated in 2001 from Baraga High School. Thomas then attended the University of Michigan where he majored in Biophysics. The University of Minnesota Medical School granted him a Doctor of Medicine degree in the spring of 2009. In his spare time Thomas enjoys spending time with his new wife, Erica, traveling, and playing winter sports such as hockey and alpine skiing. Thomas Stark, M.D.
Tom Thornton, M.D. - Tom was born and raised in Hancock, MI, in the Upper Peninsula. He attended Michigan Tech University and received a BS degree in Biological Sciences. He then attended the College of Human Medicine at Michigan State University and received his MD degree in May of 2010. In his free time he enjoys spending time outdoors with his wife Cathy and dog Slusher. He also enjoys weightlifting, playing basketball and hockey, and waterskiing. He and his wife would like to move back to the Upper Peninsula to live following residency. Tom Thornton, M.D.

Aela Vely, M.D. – Aela was born and raised in France where she developed a passion for medicine and traveling. She went to Undergrad at Hawaii Pacific University and Medical School at Saba University School of Medicine. She visited and lived in many countries but is looking forward to make a home in Michigan for the time being. On her free time she likes to watch movies, running, watching sports (especially football – the European one) and would like to start riding horses again. For her professional future, she believes she would enjoy trauma surgery but remains open to any and all options.

Alan Vorst, M.D. – Alan grew up in Springfield, OH and continued his education there at Wittenberg University as a Chemistry major. After graduating in 2006, he volunteered in Al Mafraq, Jordan at Annoor tuberculosis sanatorium, which led to a desire to be involved in medical missions. He then went to the University of Louisville for medical school and fell in love with surgery during freshman year anatomy. Hobbies include international travel, surfing, and triathlon racing. VorstAlan.jpg
Jeff Walker, M.D. - Jeff was born and raised in Boise, ID.  He attended college at the University of Utah where he graduated magna cum laude with a degree in Biomedical Engineering and a minor in Chemistry.  As an undergraduate his research focused on computer aided drug discovery for novel cancer therapeutics.  Despite his love of benchtop research, Jeff decided to pursue a career in medicine and was subsequently accepted into the University of Washington School of Medicine.  During medical school, Jeff was involved in research yet again, this time studying breast cancer oncoproteins.  He graduated in 2011 and relocated with his family to Michigan to attend residency here at St. Joseph.  When Jeff isn't at the hospital, he enjoys spending time with his wife and three children.  They enjoy taking the kids to many of the beautiful parks in the area and spending time with extended family and friends.  Among his personal hobbies, Jeff takes great interest in national politics, history, art, movies, and soccer.  He hopes to eventually move back west with his family once he completes his training.
Emily Wilczak, M.D. - Emily grew up in Canton, MI. She received her Bachelor of Science in Biochemistry from the University of Michigan in Dearborn. She then went on to earn her M.D. from Michigan State University - College of Human Medicine. While at MSU she was part of an international medicine program and enjoyed clinical rotations in Nicaragua, Costa Rica, El Salvador and Bolivia. Outside of medicine, Emily's interests include running, spending time with family and friends, playing the piano, eating sushi whenever possible, and traveling. Emily Wilczak, M.D.
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