Our Providers

Medical Providers in Frisco, TX

Humera Ahmed, MD

Humera Ahmed, MD, is a highly skilled Board-Certified Internal Medicine and Weight Loss Specialist. She is certified in Biote Hormone replacement therapy pellets. Dr. Ahmed is highly trained in Functional Medicine. She holds an active medical license in the State of Texas and, before Signature Internal Medicine, successfully practiced medicine for more than 15 years as a hospitalist and outpatient internist at Texas Health Presbyterian, Plano. 

 

Dr. Ahmed has impressive credentials, receiving her medical degree from the prestigious Dow University of Health Sciences, followed by a successful residency at the Cornell University affiliated Lincoln Medical Center, Bronx, New York City. She is a board-certified in Internal Medicine and Obesity & member of the Institute of Functional Medicine, maintaining her advanced medical credentials with continuing education.

Dr Ahmed is particularly interested in wellness, emphasizing disease prevention and preventive care, obesity, hypertension, dyslipidemia, diabetes, stroke prevention, and hormone management. She is Biote certified to provide Biote bioidentical hormone optimization therapy. Her holistic approach to treatment includes both functional and traditional medicine, intending to provide her discerning concierge patients the time and attention needed to address their healthcare comprehensively and find out the disease's root cause instead of just treating the symptoms.

 

Dr. Ahmed's medical expertise, years of skilled patient care, and attention to detail make her the perfect physician for men and women of all ages desiring superior concierge care. She is attentive to her patient's needs and focuses on helping them achieve exceptional health goals in a welcoming, friendly setting. Among her many accolades, she was most recently recognized as Top Doctors of America in 2022 and 2023 Nationwide. 

 

Dr. Ahmed enjoys spending time with her family and friends in her free time, traveling, and doing volunteer work.

 

Dr. Ahmed warmly welcomes her patients to Signature Internal Medicine for achieving their healthcare goals.

Ahmed's Memberships and Awards:

  • D-Magazine Best Internist in 2018, 2019 and 2023 
  • 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 and 2023 
  • 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

Dina Diehl, DO

Dina Diehl, DO, is a highly trained and skilled board-certified internal medicine and certified functional medicine specialist at Signature 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 Signature Internal Medicine and enjoys exceeding their healthcare expectations.

Diehl's Memberships and Awards:

  • 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
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