About
Jonathan F. Marsh, MD earned his Bachelor of Science in Biology from Purdue University in 1998, graduating Magna Cum Laude with Highest Distinction. He went on to complete his medical degree at Indiana University School of Medicine in 2002. He then completed both his internship and internal medicine residency at St. Vincent Hospital and Health Care Center in Indianapolis, finishing in 2005. He holds board certification in internal medicine and carries a license to practice in Indiana.
Dr. Marsh has spent over two decades building his practice in the greater Indianapolis community. He is passionate about preventive care, cardiovascular health, obesity, diabetes, hypertension, cholesterol management, and mental health. His guiding belief is simple: an ounce of prevention is worth a pound of cure. He has cultivated strong relationships with specialists across the Indianapolis area to advocate for patients when specialty care becomes necessary. Outside the office, Dr. Marsh follows Purdue athletics, roots for the Pacers and Colts, enjoys cooking competition shows, explores new restaurants, and travels when he can, with New York City as a favorite destination.
Education & Training
Undergraduate
Purdue University, Bachelor of Science in Biology, 1998, Magna Cum Laude with Highest Distinction
Medical School
Indiana University School of Medicine, Doctorate of Medicine, 2002
Residency
Internal Medicine Residency, St. Vincent Hospital and Health Care Center, Indianapolis, IN, 2003-2005
Additional Training
Internship, St. Vincent Hospital and Health Care Center, Indianapolis, IN, 2002-2003
Certifications
Conditions Treated
Who is Dr. Marsh right for?
Dr. Marsh is a strong fit for adults across central Indiana who prioritize prevention and proactive health management. Patients managing cardiovascular risk, diabetes, hypertension, or high cholesterol benefit from his focused clinical expertise. He also supports patients dealing with obesity or mental health concerns. Those who value direct physician access, including after-hours phone contact, will find his practice model well-suited to their needs.
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Frequently Asked Questions
Dr. Marsh treats a broad range of adult conditions. His clinical focus includes cardiovascular health, diabetes, hypertension, high cholesterol, obesity, and mental health. He also delivers preventive care and chronic disease management for patients across central Indiana.
Yes, Dr. Marsh holds board certification in internal medicine. He completed his residency training at St. Vincent Hospital and Health Care Center in Indianapolis and has practiced for over two decades.
Dr. Marsh earned his medical degree from Indiana University School of Medicine in 2002. He completed both his internship and internal medicine residency at St. Vincent Hospital and Health Care Center in Indianapolis, finishing in 2005.
Yes, members can reach Dr. Marsh directly by phone after hours and on weekends. This direct access is one of the core benefits of his concierge practice model.
Yes, Dr. Marsh holds hospital privileges at Ascension St. Vincent Carmel, Ascension St. Vincent Indianapolis, and Ascension St. Vincent Heart Center. He can advocate for and coordinate care for patients requiring hospital-level services.
Dr. Marsh takes a prevention-first approach to internal medicine. He believes that catching and addressing health risks early leads to better long-term outcomes. He has also built strong referral relationships with specialists across Indianapolis to support patients when additional expertise is needed.
Yes, Dr. Marsh serves adult patients from across the entire central Indiana region, not just those local to Carmel.
Doctor profile last updated March 21, 2026