(513) 561- 3797 info@drpretorius.com




Online appointmentCall: (513) 561-3797

Welcome to our practice!

Our certified professional nursing and physician staff supports acute and chronic patient needs including inpatient and outpatient care of:

  • Endocrine and metabolic diseases
    Diabetes, Thyroid or Adrenal
    Resistant Hypertension
    Insulin Resistance/Hypermetabolic Management
  • Neuroendocrine Diseases
    Pituitary including:
    Autoimmune Encephalopathy
  • Minor to Severe Memory Problems
    Mild Cognitive Impairment
    Alzheimer’s Disease
    Pseudobulbar Affect
    Stroke and Vascular Dementia

We provide meaningful measures of patient function:

  • Indices of cerebral metabolism and perfusion
    Brain PET
    Brain SPECT
  • 72 hour blood glucose monitoring
  • Total and differential kidney function
  • Hyperlipidemia including
    Omega 6:omega 3 ratios
    NMR Particle Number Analysis

Please call: (513) 561-3797 for appointments.

Download New Patient Registration Form
Access Patient Portal

Click here to request the appointment

Optimal outpatient clinical and inpatient hospital care for endocrine & metabolic, neuroendocrine & nuclear medicine patients.





Our Staff Certifications include:

American Board of Endocrinology and Metabolism
American Board of Internal Medicine
American Board of Nuclear Medicine
Advanced Cardiac Life Support
Basic Cardiac Life Support
American College of Radiology
Ohio State Certified Nuclear Medicine Technologists
Ohio State Registered Nursing
Ohio State Registered Phlebotomist
Ohio Department of Health

*  Please contact us for more information  *




Thank you for visiting the website for Harold T. Pretorius, MD, PhD. If you have questions or would like to know more about our practice, please contact us using the information below.

Main Office Address (Ohio):

4743 Cornell Rd,

Blue Ash, OH 45242

Phone: 513.561.3797

Fax:  513.561.4043

Email: *protected email*

Business Hours at Blue Ash Office:

Monday 7:30 am to 4 pm
Tuesday 7:30 am to 4 pm
Wednesday 7:30 am to 4 pm
Thursday 7:30 am to 4 pm
Friday 7:30 am to 4 pm
Saturday 7:30 am to 12 pm
Sunday Closed

Very knowledgeable doctor!! My husbands blood sugar was through the roof with our family doctor. My sister-in-law has been seeing him for years, so we went to see Dr. Pretorius. So glad we did!! Just listening to him speak and tell us what he has done make me a believer. Diabetes is now under control, cannot say enough good about this man!!




Erik in Milford, OH


I have been seeing Doctor Pretorius for years, and he has been successfully helping me manage my thyroid and autoimmune disease . He was the only doctor to properly find what was wrong with me , when I had been told for years that I was imagining my illness . After he probably saved my life when I had severe hyperthyroidism and Graves’ disease , I sent several friends to him who experienced the same thing . He cured them as well. Long wait ? Yes , but he makes your visit count.





My name is Tracy and Dr Pretorius literally saved my life. His knowledge is, I think, what no one else could have compared to. I could not walk without being extremely dizzy and off balance, I could not speak in any way and be understood and I had been to 6 other Drs including Ohio State and no one had the knowledge and took the time to give me the tests needed to figure out what was wrong with me. Dr Pretorius gave me a brain scan that showed the I had low blood flow to the middle and back of my brain. Caused by a virus in my Thyroid which did not need to be treated but other Drs treated me with medication that literally made me overdose and almost loose my life. I have been treated by Dr Pretorius for over a year and I am functional and happy. What a wonderful Dr. Thank you Dr Pretorius, I could never repay you with words.



Tracy Mcneal

Google Reviews

Member of following Professional Societies

Accessibility: If you are vision-impaired or have some other impairment covered by the Americans with Disabilities Act or a similar law, and you wish to discuss potential accommodations related to using this website, please contact our Office Manager at  (513) 561- 3797

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