North Texas Diabetes and Endocrinology of Plano

Enhancing Quality and Access to Healthcare

North Texas Diabetes and Endocrinology of Plano

A Premier Health Partner

4100 West 15th Street, Suite 202
Plano, TX 75093


Phone: (972) 943-5914
Fax: (940) 295-4931


Monday – Thursday: 8:00am – 5:00pm
Friday: 8:00am – 4:00pm

North Texas Diabetes and Endocrinology of Plano

“Specialized in Endocrinology. Experienced in Patient Care.”


We treat a variety of diabetes and endocrine disorders including:

  • Type 1 Diabetes
  • Type 2 Diabetes
  • Gestational Diabetes
  • Hashimoto’s Disease
  • Grave’s Disease
  • Thyroid Nodules and Cancers
  • Pituitary Disorders
  • Hemoglobin A1C Checks
  • Adrenal Disorders

We have the latest technology in the treatment of diabetes available to us and we offer in-office ultrasounds, insulin pump management, and digital retinal scans. Our highly skilled Certified Diabetes Educators provide comprehensive diabetes and nutrition education group classes and individual education tailored to your specific needs.

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Our Providers

Leo Jeng, MD

Leo Jeng, M.D. is board certified in endocrinology and metabolism. He obtained his endocrinology training at the University of Texas Health Science Center at Houston and is highly qualified to treat a full range of endocrine disorders. His primary interests are insulin resistance, dyslipidemia, osteoporosis, thyroid disorders and diabetes.

He has a special interest in insulin pumps and sensor technology and is one of the first physicians to use the new 670G closed loop pump (a.k.a. artificial pancreas) by Medtronics. He has experience with continuous glucose monitoring using both Dexcom and Libre sensors. He is passionate about integrating technology and medicine with lifestyle changes to provide the best diabetes care for his patients.

Dr. Jeng is married to Dr. Jane Ko, and they have three daughters. During his free time, he enjoys spending time with his family, playing tennis, and working on his car.

Jane Ko, MD

Dr. Jane Ko grew up in the Dallas area. She earned her undergraduate degree from Cornell University before returning to Dallas, where she earned her medical degree from UT Southwestern Medical Center.

After completing residency training in internal medicine at Emory University, she began her career in Atlanta. There, she built a strong reputation for quality, compassionate care while serving at a local hospital and at Kaiser Permanente. She eventually moved to Houston and joined the hospitalist program at Memorial Hermann Hospital.

Dr. Ko later joined Diabetes America and has specialized in diabetes care since 2010. She is passionate about helping and providing the best diabetes care to her patients.

Dr. Ko lives in Dallas with her husband and three children. She enjoys playing the piano and violin, traveling, hiking, and spending time with family.

Good Health is Within Reach

Make an appointment or simply ask us a question by emailing below or calling us at (972) 943-5914.

Contact Us