Medical Providers in Frisco, TX

Humera Ahmed, MD

Board-Certified Internal Medicine & Weight Loss Specialist | Functional Medicine Expert 


Dr. Humera Ahmed is a Board-Certified Internal Medicine and Weight Loss Specialist with over 17 years of clinical experience in North Dallas. Her board certifications in Internal and Obesity Medicine, combined with expertise in Functional Medicine, translate to a holistic approach for the treatment of conditions like obesity, hypertension, diabetes, and dyslipidemia. As a founder of Select Internal Medicine, Dr. Ahmed’s goal is to offer a compassionate, concierge-style healthcare experience that uncovers the root cause of health concerns, helping both women and men achieve optimal well-being at every stage of life. Her blend of Concierge and Functional medicine creates personalized healthcare for every patient.

Dr. Ahmed spends quality time with each patient, developing individualized care plans based on a thorough understanding of their unique health needs.

She uses advanced testing, such as:

  • Gut Health & SIBO Testing: To identify digestive imbalances and optimize gut function.
  • Mineral Allergies & Vitamin Testing: To ensure nutritional balance and support overall health.
  • Genetic, Hormone Testing & MTHFR: To uncover genetic factors affecting hormone balance, including adrenals, detoxification, and metabolism.


Dr. Ahmed is also Biote-certified in Bioidentical Hormone Replacement Therapy (BHRT), allowing her to offer cutting-edge hormone optimization treatments to support overall vitality.


Dr. Ahmed received her medical degree from the prestigious Dow University of Health Sciences and completed her residency at the renowned Lincoln Medical Center in the Bronx, New York, affiliated with Cornell University. She is committed to maintaining her advanced credentials with ongoing education, ensuring that she is always at the forefront of evolving healthcare treatments.


She has been recognized as one of the Best Doctors by D Magazine for consecutive years. 



Now welcoming new concierge members. Book a meet-and-greet to see if concierge care is right for you.

Ahmed's Memberships and Awards:

  • D-Magazine Best Internist in 2018, 2019, 2023 and 2025 
  • Board Certified in Internal Medicine
  • Board Certified in Obesity Medicine
  • Member of the Institute of Functional Medicine 
  • Member of the American College of Physicians 
  • Biote certified 2022 
  • National Committee for Quality Assurance Excellence in Diabetes Care, 2017
  • Recognized for Delivery of Quality Cardiovascular and Stroke Care, 2017-2020
  • Board member at Texas Health Presbyterian, 2010
  • Top Doctors of America selected in 2022, 2023 
  • America's Most Honored Doctors - Top 5% 2022
  • America's Most Honored Doctors - Top 5% 2021
  • America's Most Honored Doctors 2020 - Top 5%
  • Compassionate Doctor 2020
  • On-Time Physician Award - 2020
  • Patients' Choice 2020
  • Patients' Choice 2019
  • D-Magazine Best Internist in 2018 ,2019 2023 and 2025
  • Board Certified in Internal Medicine
  • Board Certified in Obesity Medicine
  • Member of the Institute of Functional Medicine 
  • Member of the American College of Physicians 
  • Biote certified 2022 
  • National Committee for Quality Assurance Excellence in Diabetes Care, 2017
  • Recognized for Delivery of Quality Cardiovascular and Stroke Care, 2017-2020
  • Board member at Texas Health Presbyterian, 2010
  • Top Doctors of America selected in 2022, 2023 
  • America's Most Honored Doctors - Top 5% 2022
  • America's Most Honored Doctors - Top 5% 2021
  • America's Most Honored Doctors 2020 - Top 5%
  • Compassionate Doctor 2020
  • On-Time Physician Award - 2020
  • Patients' Choice 2020
  • Patients' Choice 2019

Dr. Humera Ahmed's Video Testimonials

Back to Himself

Healing Starts Here

Dina Diehl, DO

Dina Diehl, DO, is a highly trained and skilled board-certified internal medicine and certified functional medicine specialist at Select Internal Medicine in Frisco, Texas. She has practiced for over 15 years with medical experience at Texas Health, Plano, as a hospitalist and outpatient internist. She has an impressive educational background.

 

Dr. Diehl completed medical school at the Philadelphia College of Osteopathic Medicine in Philadelphia, Pennsylvania. She then attended a residency program at Summa Health System in Akron, Ohio, and also completed some training at the esteemed Cleveland Clinic in Ohio.

Dr. Diehl is only 1 of 1900 providers worldwide who have earned a certification in functional medicine. 

 

Functional medicine is an individualized, patient-centered, scientific-based approach that allows patients and the practitioner to work together to address the root cause of disease instead of just treating the symptoms, and she uses this approach to promote optimal wellness. Dr. Diehl combines conventional internal medicine with functional medicine concepts to help her patients achieve their best health.

 

Dr. Dina Diehl's focus and passion are on health and wellness, and she is proactive with preventative care. She has experience in treating many chronic conditions, such as hypertension, diabetes, hypercholesterolemia, hormone therapy, gut issues, and obesity, to name a few. She not only treats these conditions but looks to find the root cause of the disease so she can see why her patients are truly unwell. 

 

In addition to standard lab tests, Dr. Diehl will use advanced testing to look deeper at patients' hormone metabolism, gut microbiomes, adrenal gland function, vitamins, and genetics when needed. By using cutting-edge, holistic testing and technologies, Dr. Diehl is able to help patients take control of their health and works closely with her patients during their healthcare journey. Her caring, friendly demeanor makes them feel comfortable during each visit.

 

Dr. Diehl maintains her medical credentials to stay current with the latest internal and functional medicine advances. She holds medical licenses in Texas and is a member of the American College of Physicians and Institute for Functional Medicine. 


In her free time, Dr. Diehl loves spending time with her family and friends, traveling, running, golfing, and skiing, as well as watching her children's sports games and maintaining a healthy lifestyle. 

 

Dr. Diehl looks forward to caring for her patients using a concierge medicine model, allowing them 24/7 access to providers, same-day appointments, and little to no office wait times. She welcomes them to Select Internal Medicine and enjoys exceeding their healthcare expectations.

Diehl's Memberships and Awards:

  • D-Magazine Best Internist in 2025 
  • Certified Functional Medicine Provider (1 of 1900 in the world)
  • Board Certified in Internal Medicine
  • Board Certified in Obesity Medicine
  • Member of the American Medical Association
  • Member of the Institute of Functional Medicine
  • American College of Physicians 
  • National Committee for Quality Assurance Excellence in Diabetes Care 2017
  • Board member at Texas Health Presbyterian, 2010 
  • Certificate of Recognition for Delivery of Quality Cardiovascular and Stroke Care 2017-2020
  • Top Internist/Top Doctor 2023 
  • America's Most Honored Professionals 2019 - Top 5%
  • America's Most Honored Professionals 2018 - Top 1%
  • America's Most Honored Professionals 2017 - Top 5%
  • Compassionate Doctor 2015
  • Compassionate Doctor 2016
  • On-Time Physician Award - 2016
  • On-Time Physician Award - 2015
  • Patients' Choice 2016
  • Patients' Choice 2018
  • D-Magazine Best Internist in 2025
  • Certified Functional Medicine Provider (1 of 1900 in the world)
  • Board Certified in Internal Medicine
  • Member of the American Medical Association
  • Member of the Institute of Functional Medicine
  • Board Certified in Obesity Medicine 
  • American College of Physicians 
  • National Committee for Quality Assurance Excellence in Diabetes Care 2017
  • Board member at Texas Health Presbyterian, 2010 
  • Certificate of Recognition for Delivery of Quality Cardiovascular and Stroke Care 2017-2020
  • Top Internist/Top Doctor 2023 
  • America's Most Honored Professionals 2019 - Top 5%
  • America's Most Honored Professionals 2018 - Top 1%
  • America's Most Honored Professionals 2017 - Top 5%
  • Compassionate Doctor 2015
  • Compassionate Doctor 2016
  • On-Time Physician Award - 2016
  • On-Time Physician Award - 2015
  • Patients' Choice 2016
  • Patients' Choice 2018

Dina Diehl, DO

Dina Diehl, DO, is a highly trained and skilled board-certified internal medicine and certified functional medicine specialist at Select Internal Medicine in Frisco, Texas. She has practiced for over 15 years with medical experience at Texas Health, Plano, as a hospitalist and outpatient internist. She has an impressive educational background.

Dr. Diehl completed medical school at the Philadelphia College of Osteopathic Medicine in Philadelphia, Pennsylvania. She then attended a residency program at Summa Health System in Akron, Ohio, and also completed some training at the esteemed Cleveland Clinic in Ohio.


Dr. Diehl is only 1 of 1900 providers worldwide who have earned a certification in functional medicine. 

 

Functional medicine is an individualized, patient-centered, scientific-based approach that allows patients and the practitioner to work together to address the root cause of disease instead of just treating the symptoms, and she uses this approach to promote optimal wellness. Dr. Diehl combines conventional internal medicine with functional medicine concepts to help her patients achieve their best health.

 

Dr. Dina Diehl's focus and passion are on health and wellness, and she is proactive with preventative care. She has experience in treating many chronic conditions, such as hypertension, diabetes, hypercholesterolemia, hormone therapy, gut issues, and obesity, to name a few. She not only treats these conditions but looks to find the root cause of the disease so she can see why her patients are truly unwell. 

 

In addition to standard lab tests, Dr. Diehl will use advanced testing to look deeper at patients' hormone metabolism, gut microbiomes, adrenal gland function, vitamins, and genetics when needed. By using cutting-edge, holistic testing and technologies, Dr. Diehl is able to help patients take control of their health and works closely with her patients during their healthcare journey. Her caring, friendly demeanor makes them feel comfortable during each visit.

 

Dr. Diehl maintains her medical credentials to stay current with the latest internal and functional medicine advances. She holds medical licenses in Texas and is a member of the American College of Physicians and Institute for Functional Medicine. 


In her free time, Dr. Diehl loves spending time with her family and friends, traveling, running, golfing, and skiing, as well as watching her children's sports games and maintaining a healthy lifestyle. 

 

Dr. Diehl looks forward to caring for her patients using a concierge medicine model, allowing them 24/7 access to providers, same-day appointments, and little to no office wait times. She welcomes them to Select Internal Medicine and enjoys exceeding their healthcare expectations.

Diehl's Memberships and Awards:

  • D-Magazine Best Internist in 2025 
  • Certified Functional Medicine Provider (1 of 1900 in the world)
  • Board Certified in Internal Medicine
  • Board Certified in Obesity Medicine
  • Member of the American Medical Association
  • Member of the Institute of Functional Medicine
  • American College of Physicians 
  • National Committee for Quality Assurance Excellence in Diabetes Care 2017
  • Board member at Texas Health Presbyterian, 2010 
  • Certificate of Recognition for Delivery of Quality Cardiovascular and Stroke Care 2017-2020
  • Top Internist/Top Doctor 2023 
  • America's Most Honored Professionals 2019 - Top 5%
  • America's Most Honored Professionals 2018 - Top 1%
  • America's Most Honored Professionals 2017 - Top 5%
  • Compassionate Doctor 2015
  • Compassionate Doctor 2016
  • On-Time Physician Award - 2016
  • On-Time Physician Award - 2015
  • Patients' Choice 2016
  • Patients' Choice 2018
  • Certified Functional Medicine Provider (1 of 1900 in the world)
  • Board Certified in Internal Medicine
  • Member of the American Medical Association
  • Member of the Institute of Functional Medicine
  • Board Certified in Obesity Medicine 
  • American College of Physicians 
  • National Committee for Quality Assurance Excellence in Diabetes Care 2017
  • Board member at Texas Health Presbyterian, 2010 
  • Certificate of Recognition for Delivery of Quality Cardiovascular and Stroke Care 2017-2020
  • Top Internist/Top Doctor 2023 
  • America's Most Honored Professionals 2019 - Top 5%
  • America's Most Honored Professionals 2018 - Top 1%
  • America's Most Honored Professionals 2017 - Top 5%
  • Compassionate Doctor 2015
  • Compassionate Doctor 2016
  • On-Time Physician Award - 2016
  • On-Time Physician Award - 2015
  • Patients' Choice 2016
  • Patients' Choice 2018

Dr. Dina Diehl's Video Testimonials

Real Care Real Connections

Care That Travels with You

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