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Dr. David Ainsworth Ontjes MD is a male Internist, has 46 years of experience and practices in Internal Medicine, Endocrinology and Metabolism, and Endocrinology, Diabetes & Metabolism.
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Dr. David Ontjes has 3 office locations.
5316 Highgate Dr
Ste 125
Durham, NC 27713

Phone Number
Locations and availability (3)
License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

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Specialties & Research

Dr. David Ontjes, MD is board certified in Internal Medicine and Endocrinology and Metabolism.

  • He has special expertise in 10 areas:
  • Adrenal Gland Diseases
  • Diabetes
  • Diabetes Mellitus
  • Diabetes
  • Osteoporosis
  • Parathyroid Gland Cancer (Parathyroid Neoplasm)
  • Pituitary Diseases
  • Pituitary Gland Cancer
  • Thyroid Cancer
  • Thyroid Diseases

Education & Awards

Dr. Ontjes graduated from Harvard University , Boston.


Dr. Ontjes has 2 hospital affiliations:

  • University of North Carolina Hospitals at Chapel Hill 
  • University of North Carolina Hospitals 

Accepted Insurance Plans

Dr. Ontjes accepts these health insurances in at least one office:

  • United Healthcare - 15 plans
  • Great-West Healthcare - 2 plans
  • Evercare - 2 plans
  • Humana - 2 plans
  • Cigna - 5 plans
  • USA H & W Network - 1 plan
  • Aetna - 3 plans
  • Blue Cross Blue Shield of North Carolina - 11 plans

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Additional Information
Where does Dr. David A. Ontjes practice?
Dr. David Ontjes practices Internal Medicine, Endocrinology and Metabolism, and Endocrinology, Diabetes & Metabolism near Durham, NC.
Additional practice locations include: Chapel Hill, NC and Sanford, NC.
See Durham Internists and Durham Endocrinologists.