Specializing in Concierge Internal Medicine in Frisco, TX

Patient Portal

What is Concierge Medicine? 

Select Internal Medicine is a superior internal medicine practice in Frisco, TX, led by Humera Ahmed, MD, and Dina Diehl, DO. We offer 24/7 access to physicians any time patients need them. Providers spend as much time as patients desire to ensure exceptional care so appointments never feel rushed.

Learn more.

Medical Services

Doctor in white coat reviews notes on clipboard with patient; medical setting.

Annual Physical

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Hands in purple gloves examining medical scans.

Cancer Screening

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Person testing blood sugar using a glucose meter. The reading is 7.0. Finger with blood drop visible.

Diabetes

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Woman measuring waist, near salad and vegetables, representing healthy eating.

Weight Loss

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Person in PPE holding a white pill bottle, indicating medication.
Bottles on a manufacturing line, likely pharmaceutical, inside a clean room.
A healthcare worker taking an elderly patient's blood pressure with an arm cuff.
Older man using a breathing exerciser with red and blue balls indoors.
Woman applying a patch to her arm, indoors, wearing glasses and a yellow top.
Woman holding stomach, possibly in pain. Indoors, wearing orange shirt and white pants, bedroom setting.
Woman in blue dress, hand on stomach with glowing kidney illustration.
Clipboard with cholesterol test details next to a stethoscope and book.
Doctor examining a patient's lower back in an office setting.
Woman in partial shadow, eyes closed, looking serene. Soft light on face and shoulder.
A doctor shows an elderly woman a tablet; they sit in a living room.
Bowls of various pills, including white, pink, and yellow capsules, on a light beige surface.

Memberships/Awards

Logo of The Institute for Functional Medicine: a spiral design with blue/green dots, text to the right.
Logos of the American College of Physicians, American Board of Internal Medicine, and American Board of Obesity Medicine.

Dr. Diehl

  • Board Certified in Internal Medicine
  • Board Certified in Obesity Medicine 
  • Certified Functional Medicine Provider
  • American College of Physicians
  • Certified Functional Medicine Provider 
  • Member of Institute of Functional Medicine
  • Member of American Medical Association
  • 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
  • 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
Gold Biote Certified Provider badge, with text
Logos of the American College of Physicians, American Board of Internal Medicine, and American Board of Obesity Medicine.

Dr. Ahmed

  • Board Certified Internal Medicine 
  • Board Certified in Obesity
  • Member of Institute of Functional Medicine
  • D-Magazine Best Internist in 2018, 2019 and 2023
  • 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
  • Member of the American College of Physicians
  • Top doctors of America selected in 2022
  • 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
  • Biote Certified

Memberships/Awards

Logo of The Institute for Functional Medicine: a spiral design with blue/green dots, text to the right.
Logos of the American College of Physicians, American Board of Internal Medicine, and American Board of Obesity Medicine.

Dr. Diehl

  • Board Certified in Internal Medicine
  • Board Certified in Obesity Medicine 
  • Certified Functional Medicine Provider
  • American College of Physicians
  • Certified Functional Medicine Provider 
  • Member of Institute of Functional Medicine
  • Member of American Medical Association
  • 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
  • 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
Gold Biote Certified Provider badge, with text
Logos of the American College of Physicians, American Board of Internal Medicine, and American Board of Obesity Medicine.

Dr. Ahmed

  • Board Certified Internal Medicine 
  • Board Certified in Obesity
  • Member of Institute of Functional Medicine
  • D-Magazine Best Internist in 2018, 2019 and 2023
  • 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
  • Member of the American College of Physicians
  • Top doctors of America selected in 2022
  • 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
  • Biote Certified

Dr. Humera Ahmed, M.D. and Dr. Dina Diehl, DO are please to announce publication of their new book.

This book reflects our passion for functional and holistic approaches and how to build lasting health from the inside out.

Patient Reviews

EXCELLENT!

★★★★★

Lanette H. | Dec 20, 2023

GREAT COMMUNICATION. VERY GOOD CALL.

★★★★★

Joseph D. | Nov 30, 2023

BEST DOCTOR EVER

★★★★★

Raymond M. | Oct 25, 2023

SHE LISTENS & DISCUSSES YOUR CURRENT SICKNESS. THEN SUGGESTS THINGS FOR YOU TO DO TO HELP GET BETTER & SHE EXPLAINS WHAT MEDICINES SHE IS PRESCRIBING AND HOW THEY SHOULD HELP. THEN IN A COUPLE DAYS SHE CALLS YOU TO SEE HOW YOU ARE DOING & MAKES FURTHER SUGGESTIONS.

★★★★★

Lila A. | Aug 16, 2023

QUICK, DETAILED, AND COMPREHENSIVE APPOINTMENT WITH HER!

★★★★★

Umar A. | Jul 24, 2023

IT WAS GREAT

★★★★★

Spencer P. | Jul 15, 2023

DR. AHMED IS VERY CARING PHYSICIAN.

★★★★★

Artel K. | May 26, 2023

VERY, VERY THOROUGH DURING YOUR OFFICE VISIT. REALLY LISTENS AND TAKES THE TIME NEEDED WHEN YOU ARE WITH HER WHICH IS SO REFRESHING AND MAKES ME CONFIDENT I AM GETTING THE BEST CARE.

★★★★★

Carmen W. | Apr 27, 2023

Insurances

We accept most insurance providers. If you have specific questions regarding your coverage, please contact us for additional information.

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