About
Jennifer Fretz, DO, earned her Bachelor of Science in Anthropology and Zoology from the University of Michigan in 1989. She went on to complete her Doctorate of Osteopathic Medicine at Michigan State University, College of Osteopathic Medicine in 1993. She completed her internship and family medicine residency at Horizon Health System/Riverside Osteopathic Hospital in Trenton, Michigan. Between residency segments, she pursued additional dermatology training at Advanced Dermatology and Laser Clinic in Moline, Illinois. She holds certification from the American Osteopathic Board of Family Physicians and maintains active membership in the American College of Osteopathic Family Physicians, the American Osteopathic Association, and the Michigan Association of Osteopathic Family Physicians.
Dr. Fretz brings more than 25 years of clinical experience across routine, urgent, and chronic conditions. She served as Director of the Family Medicine Osteopathic Residency Program at Oakwood Annapolis Hospital from 2008 to 2014, following leadership roles at Southshore Hospital. She also spent seven years mentoring new family practice physicians. The American Osteopathic Association recognized her with the Unsung Hero Award in 2014. She describes herself as a meticulous diagnostician, and her patients consistently highlight her thoroughness and her commitment to long-term relationships. Her guiding belief is straightforward: treat the whole person and encourage the habits that prevent illness before it takes hold.
Education & Training
Undergraduate
University of Michigan, Ann Arbor, MI - Bachelor of Science, Anthropology/Zoology (1989)
Medical School
Michigan State University, College of Osteopathic Medicine - Doctorate of Osteopathic Medicine (1993)
Residency
Horizon Health System/Riverside Osteopathic Hospital, Trenton, MI - Family Medicine Residency (1994-1995, 1997-1998); Internship: Horizon Health System/Riverside Hospital, Trenton, MI (1993-1994)
Additional Training
Advanced Dermatology and Laser Clinic, Moline, IL - Dermatology Training (1995-1996)
Certifications
Conditions Treated
Who is Dr. Fretz right for?
Dr. Fretz is a strong fit for adults and families seeking a thorough, relationship-driven primary care physician. Patients managing chronic conditions like diabetes or hypertension benefit from her proactive, whole-person approach. Her dermatology training makes her a good match for patients who want skin care alongside primary care. Anyone who values a diagnostician who prioritizes prevention will find her practice well-suited to their needs.
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Frequently Asked Questions
Dr. Fretz treats a wide range of conditions across family medicine, including chronic conditions like diabetes and hypertension, as well as skin concerns through her dermatology background. She also manages urgent care needs and coordinates travel-related health preparation. Her preventive focus means she actively works with patients to identify and address health risks before they become serious problems.
Yes. Dr. Fretz holds certification from the American Osteopathic Board of Family Physicians. She earned her Doctorate of Osteopathic Medicine from Michigan State University, College of Osteopathic Medicine in 1993 and has practiced family medicine for over 25 years.
Dr. Fretz takes a whole-person approach to medicine. She focuses on understanding each patient's full health picture rather than addressing symptoms in isolation. Her guiding principle is to treat the whole person and encourage the habits that prevent illness before it develops. Patients consistently describe her as thorough and committed to long-term relationships.
Yes. Dr. Fretz completed dedicated dermatology training at Advanced Dermatology and Laser Clinic in Moline, Illinois between segments of her family medicine residency. She incorporates dermatology into her practice alongside her primary care services.
Dr. Fretz directed the Family Medicine Osteopathic Residency Program at Oakwood Annapolis Hospital from 2008 to 2014. She also held leadership roles at Southshore Hospital and spent seven years mentoring new family practice physicians. The American Osteopathic Association recognized her with the Unsung Hero Award in 2014.
Dr. Fretz maintains affiliations with Beaumont Hospital in Trenton and Henry Ford Wyandotte Hospital. These affiliations support her ability to coordinate care for members who need hospital-based services.
Yes. Functional medicine is one of Dr. Fretz's listed specialties alongside family medicine and preventive medicine. Her whole-person philosophy aligns closely with a functional medicine approach, focusing on root causes and prevention rather than symptom management alone.
Doctor profile last updated March 21, 2026