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Still struggling with unexplained symptoms?It's time for real answers.

Unmatched expertise & highest standard of MD-led Functional Medicine. We find answers where others stop. We don't stop until we transform your health.

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Because you deserve more than symptom relief — you deserve answers from double board-certified MDs who know how to find and fix the root cause.

When conventional advice leaves you bewildered, exhausted, and uncertain if you'll ever regain your vitality, it's time to delve deeper.

By prioritizing care that addresses the root causes of your health issues, you unlock your potential to heal, flourish, and above all...

Reconnect with the people and passions that mean the most to you!

Board-certified MDs. Internationally recognized. Experts in functional, integrative, and precision medicine — with published research and global credibility.

Board-Certified in Obesity Medicine

Diplomate, American Board of Internal Medicine

Certified in Functional Medicine

Certified in Advanced Hormone Optimization

Trained in Advanced Peptide Therapeutics

Diploma in Integrative Ayurvedic Medicine

Research Cited on PubMed

Marquis Who’s Who Honoree

.

%

A1c

5.2%

Catch diabetes
years earlier.

ng/dL

Testosterone

Low testosterone drains energy, strength, and mood. We help bring it back.

 lbs

8

.

0

%

Weight

Weight loss programs
designed for you.

ng/g

Mycotoxins

Mold makes you sick. We find it, fix it,
and clear it.

C677T

MTHFR (Methylation Gene)

Bad genes aren’t bad if we stop them from expressing.

yrs

Biological Age

Younger than your calendar age
by 6 years.

Stress Score

78

Stress is linked to poor sleep, weight gain, and burnout.

Double Board-Certified MDs with Advanced Training in Functional and Integrative Medicine

The Functional MDs team includes double board-certified physicians in Internal Medicine and Obesity Medicine, with formal certification in functional and integrative medicine. With 13+ years of experience managing complex, multi-system patients, they bring a clinically rigorous, systems-based approach that blends conventional diagnostics with advanced functional and precision tools.

Built for Complexity. Proven by Results

Patients come to us after other practices fail — because we solve the hardest cases in functional medicine. Here, expertise matters more than protocols. Your membership includes unlimited MD visits, coaching, and nutrition — delivered as one cohesive system. Patients trust us — and the results show it.

The Highest Standard of Integrative, Functional, and Precision Medicine

We don’t work with everyone — and that’s intentional. We care for a limited number of patients to deliver non-rushed, high-access, doctor-led care that’s nearly impossible to find in today’s system. This is a game-changing approach to healing: personalized, deeply clinical, and designed to get you to the finish line — not just manage your symptoms.

Testimonials

★★★★★

I have been working with Dr. Singh at FunctionalMD for some time. I truly value his willingness to partner with me as a patient and help guide me on my healthspan journey acting not only as a licensed physician, but also a health coach. Our journey started with an in-depth gastrointestinal analysis resultisang in a microbiome makeover, which has now transitioned to a focus on longevity, centered on mind-body balance, strength conditioning, heat and cold therapy combined with vitamin and supplement management. Dr. Singh’s in-depth knowledge of Functional Medicine combined with his clinical expertise in Traditional Medicine has made a significant impact on my health, my mental clarity, and my physical performance.

Dan F

★★★★★

I traveled all the way from Champaign, Illinois, to FunctionalMD Clinic because I was dealing with back pain, low energy, and wanted to optimize my hormones and explore peptides for fitness and recovery. Dr. Singh is the AMAZING. His knowledge of peptides is on another level—he honestly reminds me of experts like Dr. William Seeds. The care and precision he puts into tailoring a plan are unmatched. If you’re serious about taking your health and fitness to the next level, I highly recommend working with a qualified professional like Dr. Singh. FunctionalMD just opened, but I have no doubt that Dr. Singh will become world-famous. He’s got incredible potential, and I feel lucky to have found him early while he’s still accessible.

Umesh M

★★★★★

Dr Singh has been instrumental in turning my health around for the better. He listens actively with sincerity, giving due time to understand my concerns, and giving attention to unraveling years of health issues. For as long as I can remember, I have struggled with gut issues, psoriasis, unknown food sensitivities, and inability to gain weight. All these concerns were never looked into as there was no scope for such discuss1ons at my regular doctor visits, other than addressing them symptomatically. But, I was interested in gaining a deeper understanding of how to improve my health and how to heal from within, without it just being symptomatic relief. This is what I found with Dr. Singh. He is a guide, and a partner in advocating for the complete health of his patients.

Pooja M

★★★★★

If you want a physician who can think out of the box and customize a treatment plan specifically based on your condition, then you must book an appointment at functional MD. This place is the complete opposite of wholesale medicine that you are exposed to at the big hospital systems. I highly recommend Dr Singh

Kunal R

★★★★★

Dr Sam is probably the most knowledgeable physician I have ever talked to. I have seen great results with his treatment. I feel like a different person in just a few weeks. Wish I had found him 5 yrs ago.

Deept R

★★★★★

I am not very expressive but one thing I really want to say that Dr. Singh literally saved my life. I was suffering with digestive issues since last almost 10 years. In those 10 years, I visited dozens and dozens of different doctors but nothing was getting better. I tried all kind of medicines (alopathic, ayurvedic, homeopathy), nothing was effective. After seeing Dr. Singh I got perfectly fine in just 2 months. Thanks Dr. Singh.

Garry S

Getting Started is Simple

STEP 1
Book a Discovery Call
STEP 2
Join Us for An Assessment
STEP 3
Look Forward to Better Health
STEP 1
Book a Discovery Call
STEP 2
Join Us for An Assessment
STEP 3
Look Forward to Better Health

If you're feeling stretched for time, energy, or finances to invest in your health presently, consider the potential consequences of neglecting it. Prevent the long-term costs of burnout and depletion that poor health may entail.

Call Our Clinic

Conditions We Treat at The Functional MDs

Hormone Optimization (Thyroid, Adrenal & HRT)

Bioidentical hormone therapy for full-spectrum balance.

Autoimmune Conditions & Chronic Inflammation

Reverse immune imbalance and reduce chronic inflammation.

Gut Health & Food Sensitivities

Heal the gut and uncover reactive foods.

Mold, Heavy Metals, and Environmental Toxins

Treat hidden toxic exposures like mold and heavy metals.

Functional Fertility & Reproductive Health

Root-cause fertility care for women and men.

Chronic Fatigue & Fibromyalgia

Uncover drivers of fatigue and chronic pain.

Detoxification & Liver Support

Strengthen liver function and eliminate internal toxin load.

Mast Cell Activation Syndrome (MCAS)

Support for complex histamine-related symptoms through systems-based, physician-guided care.

Cardiometabolic Health & Cholesterol Optimization

Support heart, blood sugar, and cholesterol health.

Longevity & Healthy Aging

Slow biological aging and support cellular vitality.

Mood & Cognitive Health

Functional approach to anxiety, brain fog, memory, and mood imbalance.

Body Recomposition & Muscle Health

Build muscle and improve body composition.

CIRS & MARCoNS

Evaluation and phased support for chronic inflammatory patterns tied to mold or biotoxin exposure.

Lyme Disease & Tick-Borne Illness

Structured care for persistent symptoms, co-infections, and immune disruption after tick exposure.

Peptide Therapy & Cellular Regeneration

Support cellular repair, recovery, and resilience—under medical guidance.

Post-Viral & Long COVID Recovery

Rebuild energy, clarity, and immune resilience—one system at a time.

What Our Process Looks Like

We start by finding the root cause with in-depth testing. Then we treat with precision protocols — and help you sustain results long-term.

1. Discover

Uncover root causes with advanced diagnostics and clinical insight.

No guessing. We go deep to find the why before we treat the what.

3. Thrive

Transition into long-term health with a stronger, more resilient body.

We help you sustain progress, prevent relapse, and optimize forward.

2. Heal

Your personalized plan combines nutraceuticals, lifestyle, and medical strategies.

Targeted care aligned with your labs, your timeline, and your physiology.

Root Cause Medicine

Hormone Replacement

Medical Weight Loss

Gut Health

Inflammation

Mold Testing

MTHFR & Genetics

PCOS

Adrenal Health

Infertility

Blood Sugar

Functional Medicine

Integrative Medicine

Ayurvedic Medicine

Detox & Drainage

Peptide Therapy

Personalized Supplements

Advanced Lab Testing

Stress & Burnout

Energy & Vitality

Insomnia

Autoimmunity

Holistic Care

Concierge Medicine

Testosterone Therapy

Alternative Medicine

Wellness Clinic

Naturopathy

Health Coaching

Infrared Sauna

IV infusion

Personalized Medicine

Menopause

Fertility Doctor

Biohacking

Bioidentical hormones

Antiageing

Food allergies

Seasonal allergies

Direct MD Care

Personalized Supplements

Diet Plans

Thyroid

Candida

Long COVID

Heavy Metal Detox

Lyme Disease

Chronic Fatigue

Longevity

Sexual Health

Meet Your Doctors

Dr Singh, MD, FACP, DABOM, IFMCP

Dr. Simranjit Singh is a double board-certified physician in Internal Medicine and Obesity Medicine, and a certified Functional Medicine practitioner through the Institute for Functional Medicine. Internationally recognized for his work in evidence-based integrative care, he brings over 13 years of experience managing complex, multi-system patients. His clinical focus includes metabolic health, diagnostic precision, and advanced functional strategies. He is also a published author and educator in the field of root-cause medicine.

Dr. Sanna, MD, DABOM

Dr. Sanna is a double board-certified physician in Internal Medicine and Obesity Medicine, with formal certification and training in Functional Medicine. Her work centers on hormone balance, functional fertility, and women’s health — including perimenopause, menopause, and metabolic optimization. She combines conventional care with personalized functional approaches to help women restore clarity, energy, and long-term hormonal balance.

The Functional MDs Experience

No guesswork. No shortcuts. Just proven care — built for people who deserve the best.

  • Patients come to us after other practices failed to find answers

  • We specialize in complex cases — and solving the hardest puzzles in medicine

  • Full hand-holding with one-on-one care from start to finish

  • Fewer patients per provider — for more time, access and personalized support

  • No scattered care: MD visits, coaching, and nutrition guidance under one seamless plan

  • Monthly membership model — no large upfront costs or long-term contracts

What’s Included In Your Care

Functional Medicine
Functional Medicine

Highest standard of Functional & Integrative Medicine. No one goes as precise as us. Your care is handled by Board Certified MDs who have expertise in both conventional and functional medicine.

Health Coaching
Health Coaching

Personalized lifestyle and nutrition programs guided by our in-house health coaches from start to finish.

Infrared Sauna, Red Light & Chromotherapy
Infrared Sauna, Red Light & Chromotherapy

Non-invasive treatment to promote cellular repair that reduces inflammation, boost immune system, increase energy & better sleep.

Personalized Nutrition Plans
Personalized Nutrition Plans

Customized dietary recommendations based on comprehensive health assessments and nutritional needs.

Peptide Therapy
Peptide Therapy

Unmatched expertise for the safest and most effective use of peptides, unlocking their full potential for your health.

Hormone Balancing
Hormone Balancing

Bioidentical Hormone Therapy (BHRT) strategies to address hormonal imbalances for improved health and vitality.

Functional & Integrative Medicine
Functional & Integrative Medicine

Highest standard of care blending conventional and functional medicine — designed to uncover and treat the root cause with unmatched clinical depth.

Advanced Functional Medicine Testing
Advanced Functional Medicine Testing

Advanced diagnostic testing using blood, stool, urine, and specialty panels to uncover hidden drivers of disease, biochemical imbalances, toxic load, and system dysfunction.

Health Coaching
Health Coaching

Structured behavior change support covering stress, sleep, activity, and habit reprogramming — fully integrated into your treatment plan.

Nutrition & Targeted Supplementation
Nutrition & Targeted Supplementation

Lab-based nutrition strategies with therapeutic supplements tailored to biochemistry, clinical priorities, and personal health goals.

Hormone Optimization
Hormone Optimization

Comprehensive evaluation and personalized therapy for thyroid, adrenal, and sex hormones using bioidentical, precision-based protocols.

Continuous Monitoring & Clinical Oversight
Continuous Monitoring & Clinical Oversight

Ongoing protocol refinement through advanced tracking, wearable data, and direct physician access — ensuring your care evolves with your progress.

Frequently Asked Questions

Have questions about our services or the functional medicine approach?

What is functional medicine?

How is Functional Medicine Different from Conventional Medicine?

What Conditions Do You Treat?

What’s Included in My First Appointment?

Do You Accept Insurance?

How Long Does It Take to See Results with Functional Medicine?

How Is Your Clinic Different from Other Functional Medicine Practices?

What Makes Your Approach Effective for Complex Cases?

Do I Need to Live Locally to Become a Patient?

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