Not another functional medicine clinic—an idea to transform the world by setting the bar high in root-cause and integrative medicine.
Dr Singh is a board-certified physician specializing in Internal Medicine, Obesity Medicine, and Functional Medicine. As the CEO and Medical Director of The Functional MDs Clinic in Carmel, Indiana, he is dedicated to bridging the gap between conventional and functional medicine, offering a science-backed, root-cause approach to patient care.
With an impressive academic and research background, Dr. Singh has authored 33 scientific papers, 4 book chapters, and 4 international guidelines. His expertise in metabolic health, hormone optimization, and preventative medicine has made him a trusted name in evidence-based, integrative healthcare.
Dr. Singh’s approach at The Functional MDs Clinic focuses on identifying the root causes of chronic illnesses, utilizing advanced diagnostics, personalized nutrition, targeted supplementation, and lifestyle medicine. Whether addressing hormonal imbalances, gut health, cardiovascular risk, or fertility concerns, he prioritizes precision medicine tailored to each individual.
Beyond patient care, Dr Singh is passionate about medical education, research, and innovation in healthcare delivery. His experience as a Hospitalist at Indiana University Methodist Hospital (one of the country's top hospitals) and his functional medicine expertise position him uniquely to merge modern medical advancements with holistic healing.
Through The Functional MDs Clinic, Dr. Singh is redefining healthcare by empowering patients to take control of their health with proactive, personalized, and preventative care strategies.
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Double Board-Certified in Internal Medicine & Obesity Medicine
Advanced Training in Functional & Integrative Medicine
Dr. Sanna Singh is a double board-certified physician with over 13 years of clinical experience and advanced training in functional and integrative medicine. Her areas of focus include hormone health, metabolic conditions, and functional fertility, working with both men and women across a wide range of hormonal and endocrine concerns. She routinely evaluates and manages cases involving perimenopause, menopause, low testosterone, adrenal dysfunction, and reproductive challenges, bringing a structured, lab-informed approach to diagnosis and treatment planning.
Her background in both conventional and functional medicine allows her to design personalized strategies that integrate bioidentical hormone therapy, nutrition, lifestyle modification, and metabolic support. She is known for her clinical precision, calm demeanor, and ability to work with patients at various stages of their health journey — from those navigating complex hormonal shifts to those seeking long-term optimization and preventative care.
Schedule AppointmentOffice Manager & Certified Functional Medicine Health Coach
With over 20 years of experience in healthcare, Rachel brings a rare combination of clinical insight, operational excellence, and heart-centered leadership to her role at The Functional MDs.
As both your Office Manager and Certified Functional Medicine Health Coach, Rachel plays a key role in ensuring your care is not only personalized — but seamless, responsive, and deeply supported at every step. She draws on her extensive background in conventional medicine — including years as a medical assistant — to help bridge the worlds of functional and traditional care. Rachel understands how the system works and is passionate about helping you navigate it with clarity and ease.
Known for her compassion, precision, and unwavering dedication, Rachel is here to support your healing journey — whether she’s coordinating your care behind the scenes or working with you directly on lifestyle and protocol implementation. the steady presence every great practice needs — and every patient deserves
Certified Functional Medicine Health Coach
Megan is a certified Functional Medicine Health Coach with a passion for helping you uncover how capable your body is of healing. She brings a whole-person approach — supporting your physical, mental, and emotional health through personalized strategies that are sustainable, practical, and deeply empowering.
You’ll work with Megan to translate your physician-led protocol into real-life action — from nutrition and sleep to mindset, stress, and daily rhythm. Her coaching style is grounded in grace, structure, and consistency — helping you build momentum without overwhelm or perfectionism.
Whether you're working to increase energy, reduce inflammation, balance hormones, or create healthier habits, Megan is here to ensure you feel supported, seen, and equipped every step of the way.
Outside the clinic, she’s often cooking nourishing meals, spending time in nature, or adventuring with her husband and toddler. Above all, Megan is here to walk with you as you move toward your full potential — body, mind, and spirit.
Certified Functional Medicine & Integrative Health Coach
FMACC, IHP, Certified Health & Wellness Coach
Par Reehal brings over 25 years of experience in the pharmacy and healthcare industry to her role as a Functional Medicine and Integrative Health Coach. With a diverse background spanning hospital, retail, PBM, mail order, and specialty pharmacy settings, Par combines deep clinical insight with a compassionate, whole-person approach to care.
Par’s mission has always been to help people feel better—physically, mentally, and emotionally—and to support those around her in growing into their highest potential. In addition to her extensive pharmacy experience, she has spent over a decade in product leadership roles, including key positions at Walgreens Boots Alliance and CVS Caremark. In these roles, she led teams, shaped strategic product roadmaps, and successfully bridged the gap between business, technology, and patient-centered implementation.
Now, as a Certified Health and Wellness Coach, Integrative Health Practitioner, and Functional Medicine Academy Certified Coach, Par integrates conventional healthcare expertise with a root-cause, personalized approach to wellness. She supports clients with a wide range of chronic and complex conditions—guiding them through nutrition, lifestyle, gut health, hormonal balance, and stress management strategies that support sustainable healing and vitality.
Fluent in English, Hindi, and Punjabi, Par is especially passionate about serving diverse communities with empathy, cultural awareness, and evidence-informed care. She is known for her warm communication style, data-informed mindset, and ability to empower clients with both clarity and confidence.
Whether helping a client navigate autoimmune issues, insomnia, or chronic stress, Par’s commitment remains the same: to walk beside each individual on their journey to greater health, energy, and balance.
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Our team brings a wealth of expertise in functional medicine, specializing in uncovering and addressing the underlying factors contributing to health issues.
With a focus on personalized wellness plans, informed by extensive training and experience, our is dedicated to guiding patients towards sustainable health and vitality.
We’re a team of health fanatics🧠💪, brought together by one mission— Human Well-Being.
"Your body is always speaking—symptoms are just the language. The real question is, are we listening?"
The Functional MDs
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