Dr. Simranjit SinghMD, FACP, DABOM, FMACP, IFM-CP
Internal Medicine
at The Functional MDs — Carmel, IN
About
Dr. Simranjit Singh is the Founder and CEO of The Functional MDs in Carmel, Indiana. He holds board certification in both Internal Medicine and Obesity Medicine. He also earned the IFM Certified Practitioner designation through the Institute for Functional Medicine. His Internal Medicine training took place at the University of Illinois.
Before founding The Functional MDs, Dr. Singh served as a hospitalist and faculty physician at Indiana University Health Methodist Hospital. That academic role included leadership responsibilities, system-level quality improvement work, and significant research contributions. He has authored more than 30 peer-reviewed scientific publications, multiple book chapters, and internationally recognized clinical guidelines. Dr. Singh is passionate about metabolic health, hormonal health, cardiometabolic care, and longevity medicine. He also focuses on complex conditions including CIRS, Long COVID recovery, functional fertility, autoimmune conditions, gut health, and mood and cognitive health. He conducts telehealth visits via secure video for patients across Indiana, Illinois, Michigan, and Washington. His YouTube channel, Dr Singh MD, features educational content on functional and precision medicine.
Education & Training
Residency
Internal Medicine, University of Illinois
Additional Training
Faculty Physician and Hospitalist, Indiana University Health Methodist Hospital; IFM Certified Practitioner (IFM-CP) through the Institute for Functional Medicine
Certifications
Conditions Treated
Who is Dr. Singh right for?
Dr. Singh is a strong fit for adults managing complex or hard-to-diagnose chronic conditions. Patients dealing with hormonal imbalances, autoimmune conditions, gut dysfunction, or cardiometabolic concerns benefit from his precision approach. He works well with patients seeking answers after conventional care has fallen short. Those recovering from Long COVID, dealing with CIRS, or navigating functional fertility challenges find a focused and experienced partner in Dr. Singh.
Similar Doctors Nearby
Dr. Ellen AntoineDO, FACEP, ABOIM, IFMCP
lupus, autoimmune disease, PANDAS +7 more
Dr. Joseph MartinMD
hypertension, hypercholesterolemia, menopause +4 more
Dr. Souhaila RichardsonMD
hypertension, diabetes, chronic conditions +1 more
Frequently Asked Questions
Dr. Singh treats a broad range of complex chronic conditions. His core focus includes hormone optimization, cardiometabolic health, gut health, autoimmune conditions, CIRS, Long COVID recovery, functional fertility, mood and cognitive health, and longevity medicine. He also addresses obesity, thyroid health, Lyme disease, mast cell activation syndrome, and chronic fatigue.
Yes. Dr. Singh holds board certification in both Internal Medicine and Obesity Medicine. He also earned the IFM Certified Practitioner designation through the Institute for Functional Medicine and serves as a Fellow of the American College of Physicians.
Dr. Singh completed his Internal Medicine training at the University of Illinois. Before founding The Functional MDs, he also served as a hospitalist and faculty physician at Indiana University Health Methodist Hospital, where he led quality improvement initiatives and conducted extensive research.
Dr. Singh uses a three-phase model called Discovery, Heal, and Thrive. The Discovery phase relies on specialized laboratory testing and detailed biochemical analysis. The Heal phase delivers personalized treatment plans combining nutrition, targeted therapies, and lifestyle medicine. The Thrive phase focuses on building long-term resilience.
Yes. Dr. Singh has authored more than 30 peer-reviewed scientific publications, multiple book chapters, and internationally recognized clinical guidelines. He developed this research background during his faculty physician role at Indiana University Health Methodist Hospital.
Yes. Dr. Singh conducts telehealth visits via secure video for patients in Indiana, Illinois, Michigan, and Washington. Patients outside Indiana can access his care entirely through virtual appointments.
Dr. Singh combines the rigor of academic internal medicine with advanced functional medicine training. His background includes more than 30 peer-reviewed publications and clinical guideline development alongside deep training in root-cause, systems-based care. He applies advanced functional medicine testing to build individualized treatment plans.
Yes. Dr. Singh holds board certification in Obesity Medicine and focuses heavily on metabolic health. He addresses body recomposition, cardiometabolic risk, hormonal contributors to weight, and related conditions through a functional and precision medicine framework.
Doctor profile last updated March 21, 2026