About
Dr. AJ Ronan has practiced primary care medicine for more than two decades in Lansing, Michigan. He earned his Bachelor of Science in Psychology from Michigan State University in 1993. He then completed his Doctorate of Osteopathic Medicine at the University of Des Moines in 1997. Dr. Ronan completed his internship and Family Medicine residency at Ingham Regional Medical Center, right in Lansing. He served as Chief Resident from 1999 to 2000 and received the Outstanding Resident Award.
Dr. Ronan holds board certification from the American Osteopathic Board of Family Practitioners. He has served as a Clinical Assistant Professor at Michigan State University College of Osteopathic Medicine since 2002. Teaching remains a core passion alongside his clinical work. He carries a deep interest in cardiometabolic disorders, focusing on high cholesterol, hypertension, and diabetes. His mission is to help patients pursue active, fulfilling lives while he works alongside them toward their health goals. Outside the office, he enjoys road cycling, downhill skiing, hunting, fishing, and time with his family.
Education & Training
Undergraduate
Michigan State University, Bachelor of Science, Psychology, 1993
Medical School
University of Des Moines, Doctorate of Osteopathic Medicine, 1997
Residency
Family Medicine, Ingham Regional Medical Center, Lansing, MI, 1998-2000; Chief Resident 1999-2000; Outstanding Resident Award 2000-2001
Additional Training
Internship, Ingham Regional Medical Center, Lansing, MI, 1997-1998; Clinical Assistant Professor, Michigan State University College of Osteopathic Medicine, 2002-present
Certifications
Conditions Treated
Who is Dr. Ronan right for?
Dr. Ronan suits adults who want a long-term primary care relationship built on genuine familiarity. Patients managing high cholesterol, hypertension, or diabetes benefit most from his cardiometabolic focus. He works well with people who want advanced cardiovascular screenings and proactive prevention planning. Those who value after-hours access and same-day appointments will find his practice a strong match.
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Frequently Asked Questions
Dr. Ronan focuses on family medicine and preventive care, with a particular emphasis on cardiometabolic disorders. He treats high cholesterol, hypertension, and diabetes. He also uses the MDVIP Wellness Program to deliver advanced cardiovascular screenings and deeper risk assessment for his patients.
Yes. Dr. Ronan holds board certification from the American Osteopathic Board of Family Practitioners. He earned his Doctorate of Osteopathic Medicine from the University of Des Moines and completed his residency training at Ingham Regional Medical Center in Lansing.
Dr. Ronan earned his medical degree from the University of Des Moines in 1997. He completed both his internship and Family Medicine residency at Ingham Regional Medical Center in Lansing. He served as Chief Resident from 1999 to 2000 and received the Outstanding Resident Award.
Yes. Dr. Ronan has served on the teaching faculty at Michigan State University for more than 15 years. He holds the title of Clinical Assistant Professor at MSU College of Osteopathic Medicine, a role he has maintained since 2002.
Dr. Ronan dedicates significant time to prevention and wellness at every visit. He uses the MDVIP Wellness Program to offer advanced cardiovascular screenings and comprehensive testing. He works to identify risk factors early and build personalized health plans that keep patients ahead of potential problems.
Yes. Dr. Ronan stays reachable by phone after hours and on weekends for urgent concerns. His MDVIP-affiliated practice makes direct physician access a core part of the care experience.
Dr. Ronan holds affiliations with Sparrow Health System and McLaren Greater Lansing. These relationships support his patients when they need hospital-level care in the Lansing area.
Dr. Ronan sees patients of all ages with a primary focus on adults managing chronic or preventable conditions. He works especially well with patients who want a deeply personalized care relationship and dedicated time during each visit. His cardiometabolic expertise makes him a strong fit for patients with heart health or metabolic concerns.
Doctor profile last updated April 11, 2026