At The Functional MDs, every patient is seen by physicians who listen deeply, think holistically, and treat the root cause, not just the symptoms. Meet our team of board-certified doctors leading a new standard in functional and integrative medicine.
Dr Singh is a board-certified physician specializing in Internal Medicine, Obesity Medicine, and Functional Medicine. As the Founder & CEO 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.
His background as a Faculty & Hospitalist at Indiana University Methodist Hospital and his advanced training in Functional & Integrative Medicine position him uniquely at the intersection of conventional expertise and cutting-edge personalized care. With an impressive academic and research background, Dr. Singh has authored 33 scientific papers, 4 book chapters, and 4 international guidelines.
Dr. Singh’s approach is built for individuals who want a higher standard of care, people who value clarity, strategic guidance, and meaningful results. Using advanced diagnostics and a precision-driven framework, he helps patients optimize their health, enhance resilience, and perform at their best.
At The Functional MDs, Dr. Singh’s mission is simple: elevate the standard of modern healthcare and help individuals take full control of their long-term well-being.
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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.
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Office Manager & 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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