Meet Our Physicians
Family Medicine
Unlike internal medicine physicians, or internists, who focus solely on adults, family medicine physicians are trained to care for men, women and children of all ages. Family medicine physicians provide a full range of healthcare services, including routine obstetrics and gynecological and pediatric care. They also offer continuous care for a variety of complex and sometimes chronic medical conditions that may involve multiple systems.
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David S. Darr, MD
Family Practice Physician David S. Darr, MD joined Kosciusko Medical Group in July 1999. He was born and raised in the Warsaw area. He earned a bachelors degree of science from Grace College and a medical degree from Indiana University School of Medicine in 1996. He completed his residency at Memorial Hospital of South Bend. Dr. Darr is a board certified physician through the American Board of Family Practice. |
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David W. Dick, MD
Born and raised in Canada, David W. Dick, MD joined Kosciusko Medical Group in September 1995. Prior to moving to the Warsaw area, Dr. Dick practiced medicine in Canada from 1982 to 1995. He earned his medical degree at the University of Saskatchewan and completed his internship at St. Paul's Hospital in Canada. Dr. Dick is board certified through the American Board of Family Practice and is certified in family medicine by the College of Family Physicians of Canada. |
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Geoffrey K. Hadlock, MD
Board certified family practice physician Geoffrey Hadlock, MD joined Kosciusko Medical Group in March 2003. Dr. Hadlock earned his medical degree from Oregon Health Sciences University in 1995. He completed a family practice residency in 1998 at Northeast Iowa Family Practice. Dr. Hadlock is board certified through the American Board of Family Practice. |
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Rebecca J. Johnson, DO
Family practice physician Rebecca Johnson, DO joined Kosciusko Medical Group in July 2005. She earned her medical degree from Philadelphia College of Osteopathic medicine in 2002. Dr. Johnson completed a family practice internship at St. Joseph Hospital in Mishawaka, IN in 2003 and a family practice residency program at Conemaugh Memorial Medical Center in Johnstown, PA in 2005. Dr. Johnson is board certified through the American Board of Family Medicine. She specializes in adult medicine. |
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Erin Jungbauer, MD
Family Practice Physician Erin B. Jungbauer, MD joined Kosciusko Medical Group in 1992. Born and raised in Indiana, Dr. Jungbauer earned her medical degree from Indiana University School of Medicine in 1989. She completed her residency at Saint Joseph's Medical Center in South Bend in 1992. Dr. Jungbauer is board certified through the American Board of Family Practice. |
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John K. Kratzer, DO
Board certified family practice physician John Kratzer, DO joined Kosciusko Medical Group in 1991. Dr. Kratzer has practiced medicine since 1985 earning his medical degree from the University of Osteopathic Medicine and Health Sciences in 1983. He completed his internship in 1984 at Lansing General Hospital and a family practice residency at Botsford General Hospital in 1985. Dr. Kratzer is board certified through the American Osteopathic Board of Family Practice. |
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Daniel L. Loney, DO
Born in Michigan, Daniel Loney, DO joined Kosciusko Medical Group in 1998. Dr. Loney earned his medical degree from Kirksville College of Osteopathic Medicine in 1988. He completed an internship at Michiana Community Hospital in 1989 and a family practice residency at Michiana Community Hospital in 1991. Dr. Loney is board certified through the American Osteopathic Board of General Practice. |
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Emma L. Long, MD
Board certified family practice physician Emma Long, MD has been practicing medicine since 1997. She joined Kosciusko Medical Group in 2006. Dr. Long earned her medical degree from Loma Linda University in 1994 and completed a family practice residency in 1997 in Hinsdale, Illinois. Dr. Long is board certified through the American Board of Family Practice. |
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Lynn M. Losby, MD
A former Lieutenant Commander in the U.S. Navy, family practice physician Lynn M. Losby, MD joined Kosciusko Medical Group in 2001. Practicing family medicine since 1985, Dr. Losby earned her medical degree from The University of Iowa College of Medicine in 1985. She completed her internship at Spartanburg General Hospital in 1986 and a family practice residency at St. Vincent's Medical Center in Jacksonville, Florida in 1995 where she was Intern of the Year in 1993. Dr. Losby has provided obstetrical care since 1995. She is board certified through the American Board of Family Practice. |
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N. George Macdonald, MD
Practicing medicine in Warsaw since 1995, family practice physician N. George Macdonald, MD earned his medical degree from Dalhousie University in Nova Scotia in 1979 and completed his residency at Dalhousie in 1981. Previously in a private practice setting, Dr. Macdonald joined Kosciusko Medical Group in November 2009. Dr. Macdonald is board certified through the American Board of Family Medicine. |
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Francisco Negreros, MD
Born and raised in Mexico, Francisco Negreros, MD joined Kosciusko Medical Group in September 2000. Prior to moving to the Akron area, Dr. Negreros practiced medicine in Illinois. He earned his medical degree at the National University in Mexico in 1973. Dr. Negreros completed a family practice internship at Regional Hospital of the State Health Department and a general surgery residency at Saint Josephs Hospital in Chicago. |
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Sung J. Park, MD
Family practice physician Sung Jae Park, MD earned his medical degree from Loma Linda University in 1996. He completed his family practice residency in 1999 through Temple University. Practicing in Warsaw since 1999, Dr. Park joined Kosciusko Medical Group in November 2009. Dr. Park is board certified through the American Board of Family Medicine. |
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Brian Reichenbach, MD
Born in Iowa, family practice physician Brian Reichenbach, MD earned his medical degree from the University of Iowa in 2004. He completed a family practice residency in 2007 at Memorial Hospital of South Bend. Dr. Reichenbach joined Kosciusko Medical Group in November 2009. He is a volunteer faculty member with the Indiana University School of Medicine serving as a community preceptor for the Department of Family Medicine's Third Year Clerkship. Dr. Reichenbach is board certified through the American Board of Family Medicine. |
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William Remington, Jr., MD
Family practice physician, William Remington, Jr., MD earned his medical degree from Ohio State University College of Medicine in 1985. He completed a family practice residency at Akron City Hospital in Akron, Ohio. Practicing in Warsaw since 1990, Dr. Remington joined Kosciusko Medical Group in 1996. Dr. Remington is board certified through the American Board of Family Medicine. |
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Douglas E. Sawyer, MD
Born in Wabash, IN Douglas Sawyer, MD earned his medical degree from the Indiana University School of Medicine in 1975. He completed his family practice residency in Fort Wayne in 1978. Dr. Sawyer has practiced medicine in Warsaw since 1978. He joined Kosciusko Medical Group in November 2009. Dr. Sawyer teaches at the Fort Wayne Family Medicine Residency program and is board certified through the American Board of Family Medicine. |
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Patrick C. Silveus, MD
Family practice physician Patrick C. Silveus, MD joined Kosciusko Medical Group in November 1996. Dr. Silveus received his medical degree from Indiana University School of Medicine and completed his residency at Methodist Hospital, Indianapolis, Indiana. Dr. Silveus has practiced medicine in Mentone since 1984. |
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J. Elizabeth Struble, MD
Family practice physician J. Elizabeth Struble, MD joined Kosciusko Medical Group in May 2011. Dr. Struble earned her medical degree from Michigan State University in 2007. She completed her internal medicine internship at Fletcher Allen Healthcare in Vermont in 2008 and her family practice residency program from Fort Wayne Medical Education Program in 2011. Dr. Struble is board-certified through the American Board of Family Medicine.
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Rex A. Wieland, MD
Joining Kosciusko Medical Group in 1999, Rex A. Wieland, MD has been practicing medicine since 1978. Dr. Wieland earned his medical degree from Indiana University School of Medicine in 1975. He completed his residency in family practice at South Bend Memorial Hospital in 1978. He practiced at the Manchester Clinic from 1978 to 1998, North Webster Medical Clinic from 1999 to 2006 and is currently practicing at Walnut Street Family Healthcare since 2006. |
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Michael R. Williams, MD
Born and raised in Indiana, Michael R. Williams, MD joined Kosciusko Medical Group in July 1994. Dr. Williams earned his medical degree from Indiana University School of Medicine in 1980. He completed his family practice residency and internship at St. Francis Hospital in Beech Grove, Indiana in 1983. Dr. Williams has practiced medicine in Kosciusko County since 1984 and has been a Fellow of the American Academy of Family Physicians since 1991. |
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Lori J. Zimmerman, DO
Family practice physician Lori J. Zimmerman, DO joined Kosciusko Medical Group in August 1999. Dr. Zimmerman earned her medical degree from Michigan State University College of Osteopathic medicine in 1996. She completed her internship in 1997 and then her residency program in 1999 at Genesys Regional Medical Center in Grand Blanc, Michigan. Dr. Zimmerman is board certified through the American Osteopathic Board of Family Physicians.
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