Dr. Jennifer St John, DO

Dr. Jennifer St John, DO

Endocrinology, Diabetes & Metabolism  |  
Female  |  
Age 36
Insurances AcceptedSave
Dr. Jennifer St John, DO is an endocrinology, diabetes & metabolism doctor who practices in McKinney, TX. She is 36 years old and has been practicing for 7 years.

5236 W University Dr Ste 2200

McKinney, TX 75071

Contact Information

(469) 800-5400

Insurance Accepted

  • Aetna
  • Blue Cross Blue Shield
  • Cigna
  • Humana
  • UnitedHealthCare

*Please verify this information when scheduling an appointment.

Learn about Dr. St John

Be confident in your decisions by checking out your provider's top areas of care, education, patient reviews and more. Learn about finding the right doctor for you

Top Care Areas


See how frequently Dr. St John performs your care needs compared to other doctors.

very high
more than 98% of peers
Thyroid Disease
more than 82% of peers
Diabetes Counseling
more than 81% of peers

Dr. St John's percentages are based on the rate of treatment compared to peers nationwide from insurance data. Learn more info about our data and this Top Care Areas component.

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  • Endocrinology, Diabetes & Metabolism

Board Certifications

  • Endocrinology
    Accredited by: American Osteopathic Board of Internal Medicine*
  • Internal Medicine
    Accredited by: American Osteopathic Board of Internal Medicine*

Conditions Treated

  • Abnormal Thyroid
  • Adrenal Cortex Diseases
  • Adrenal Gland Diseases
  • Autoimmune Diseases
  • Autoimmune Thyroid Diseases
  • Bone Disorders
  • Breast Diseases
  • Calcium Metabolism Disorders
  • Cancer
  • Cushing's Syndrome
  • Diabetes Mellitus, Secondary
  • Diabetes Type 1
  • Diabetes Type 2
  • Diabetes With Renal Manifestations
  • Diabetic Ketoacidosis
  • Goiter
  • Graves' Disease
  • Hashimoto's Disease
  • Hypercalcemia
  • Hyperlipidemia
  • Hyperparathyroidism
  • Hyperthyroidism
  • Hyposmolality and Hyponatremia
  • Hypothyroidism
  • Kidney Disease
  • Lipid Disorders
  • Obesity
  • Osteoporosis
  • Parathyroid (Gland) Disease
  • Pituitary Disease
  • Rickets
  • Testosterone Deficiency
  • Thyroid Cancer
  • Thyroid Cyst
  • Thyroid Disease
  • Thyroiditis
  • Vitamin D Deficiency


Read More


  • Continuous Glucose Monitoring
  • Diabetes Counseling
  • Diet Counseling
  • Exercise Counseling
  • Insulin Pump Therapy

Background Check

0 Malpractice Claims

No malpractice history found for Texas.

0 Sanctions

No sanctions history found for the years that Healthgrades collects data.

0 Board Actions

No board actions found for the years that Healthgrades collects data.


  • University Of Florida
    Undergraduate School | Graduated 2003
  • Lake Erie College Of Osteopathic Medicine
    Medical School | Graduated 2010
  • Oklahoma State University Medical Center
    Residency Hospital | Completed 2013
  • University Of Oklahoma Health Sciences Center
    Fellowship Hospital | Completed 2015

Awards & Recognition

Awards & Honors
  • Healthgrades Honor Roll
Media & Publications

Dr. St John has no media or publications listed.

Languages Spoken

  • English

Memberships & Professional Affiliations

Dr. St John does not have any memberships or affiliations listed. If you are Dr. St John and would like to add memberships or affiliations, please update your profile.

Dr. St John's Reviews

Likelihood of recommending Dr. St John to family and friends
based on 15 total reviews (9 with comments)
Dr. St John's Performance
  • Trustworthiness
  • Explains condition(s) well
  • Answers Questions
  • Time well spent
Office & Staff Performance
  • Scheduling
  • Office environment
  • Staff friendliness
  • Average wait time
    10 to 15 minutes
Patient Comments (9)
Plano, TX |
One of the most inattentive and inarticulate physicians I've ever experienced. Seems to be well behind on latest diabetes treatment, medication and technology. During one-year association, spent more time watching the back of her laptop instead of her sharing treatment issues or diagnoses - other than just upping insulin. Have new, wonderful endocrinologist in Plano that in 2 weeks has cut my glucose levels by 2/3rds and now in normal range.
in Carrollton, Texas |
I would never go to this physician again!! I was a brand new patient who had an Urgent request from my rhuemoltologist. I asked them to send me the paperwork by mail, which they did not!! I drove all the way from Carrollton, taking almost 40 minutes. When I arrived it was 10:10, a person was in front of me. I was told she would not see me because I didn't have my paperwork filled out. I explained I asked it to be sent by mail and never received it. The doctor oath is to do no harm, I was harmed!
Allen, TX |
She is great. Really helped me solve my issues.
Harwood, TX |
She is not up to date on the latest thyroid and parathyroid treatments. I am having to have a second surgery in 6 months because she misdiagnosed my parathyroid tumor. She has a set protocol she follows for all patients even though everyone is different. I found her to be unsure of herself and indifferent to my feelings. I definitely don't recommend her for personalized treatment. She is a quack who can't think outside of her little box.
in Princeton, TX |
She is uneducated about thyroid and parathyroid disease. I had high calcium for several years, and she failed to diagnose my parathyroid tumor. Now I am having to have a 2nd surgery within 6 months of having my thyroid removed. I should have had the parathyroid tumor removed at the same time that my thyroid was removed. She was very cold and uncaring toward me when I was so scared and felt horrible after my surgery. She just said, "See you in 3 weeks for another blood test." No thanks!
in Mckinney, TX |
She is outstanding in understanding the needs and offering solutions. She is very meticulous about diagnosis. She knows what it takes to make me healthy again.
in Dallas, TX |
Love this doctor! She listens and takes her time. I don't ever feel rushed.
in Honey Grove, TX |
After a year with my previous endocrinologist, I have felt defeated about my ability to manage my condition. After my first appointment with Dr. St John, I truly feel better about how I can manage everything that has been thrown at me. I would recommend this doctor to anyone in search of a truly caring individual who is willing to help you opposed to the care that I was getting.
in Nevada, TX |
Dr. St John spent a lot of time with me and ran every test she could think of that could explain what was happening. She took extra time to research my various ailments and situation before deciding what tests needed to be done. I see a lot of doctors and it is refreshing to come across one so dedicated and honest. She is easy to talk to and doesn't condescend. I am thrilled with her!
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Now Accepting New Patients
Dr. St John accepts 5 insurance carriers
  • Aetna
  • Blue Cross Blue Shield
  • Cigna
  • Humana
  • UnitedHealthCare
    United Healthcare

*Please verify this information when scheduling an appointment.

Hospitals where Dr. St John has admitting privileges

Baylor Medical Center at McKinney
5252 W University Dr
McKinney, TX 75071
View Hospital Profile

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