Dr. Jonathan Leffert, MD


Internal Medicine | Male

North Texas Endocrine Center 9301 N Central Expy Ste 570 Dallas, TX 75231 Get Directions
Dr. Jonathan Leffert, MD

Dr. Jonathan Leffert, MD is an internal medicine doctor who practices in Dallas, TX. He is 59 years old and has been practicing for 34 years. Dr. Leffert is affiliated with Medical City Dallas and Medical City Children's Hospital and Texas Health Presbyterian Hospital Dallas.

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Dr. Leffert's Experience

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Languages Spoken

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Memberships & Professional Affiliations

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Visiting Dr. Leffert

Dr. Leffert accepts 21 insurance carriers

Affiliated Hospitals

Hospital Quality
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Dr. Leffert's Reviews

Likelihood of recommending Dr. Leffert to family and friends
based on 29 total reviews (6 with comments)
Dr. Leffert's Performance
  • Trustworthiness
  • Explains condition(s) well
  • Answers Questions
  • Time well spent
Office & Staff Performance
  • Scheduling
  • Office environment
  • Staff friendliness
  • Average wait time
    31 to 45 minutes
Patient Comments (6)
in Dallas, TX |
Dr. Leffert's office was able to get my son in very quickly, in fact they even called when they had a cancellation and moved his appointment up a week. Dr. Leffert spent well over an hour with my son and took the time to answer all of our questions, never once acting bothered by us. I left a message with his staff after my son had a trip to the ER and Dr Leffert personally called to check on him.. Highly recommend his office
in Atlanta, tx |
I have not even been in to see this Doctor yet and I am regretting making the appointment. I live 3 hours away and can not even get anyone on the phone. Took 3 days of endless calling to make an appointment. I have been on hold NOW for 15 mins collectively. Hung up on 3 times and when I called back the last I got "thank you for calling can you please hold?" I said no ma'am I have been holding and have been hung up on 3 times. She says "OH well hold on" that was 7 mins ago now.
in Dallas, TX |
He seemed nice enough but I felt a tad rushed with my first visit with him. Once my visit was done and it came to talk about returning he informed that I would not see him any more but his PA. I don't mind PA's but I have an issue with paying the same amount to see a PA as the doctor. I did not return.
in Grand Prairie, TX |
I like his treatment approach. His staff is an entirely different matter for the most part. His medical assistant takes a very long time to get back on any messages - matter of fact her vmail states something to the effect "don't leave more than 1 vmail I'll get to you". I can't imagine having that on my work vmail! Front desk staff not much better - can't be bothered and have zero compassion. Not fit for a job in the medical field.
in Dallas, TX |
I agree with others, I like Dr. Leffert but the wait times and trying to reach out to the clinic is a cat and mouse game to get to actually talk to someone. I get no response and just get frustrated that no one can help me and when I am coming in the office it's always a LONG 2 hour or more wait to see the DR.
in Dallas, TX |
Dr Leffert is a fine doctor, but scheduling and wait times seem to be problematic. The shortest wait time I have ever had was 90 minutes, but usually is around 2 hours. Then when I do see the doctor the appt has never been more than 10 minutes. I understand that doctors can run behind, but the staff should call and let the patients know so that they don't have to leave work and sit in the waiting room. Telling the patient the doctor is running late after arrival at the office is pointless.
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Dr. Leffert's experience matches your search based on the following criteria:

  •  Based on total number of patients treated over the last 12 months
  •  Specializes in Internal Medicine
  •  Board certified in Diabetes, Metabolism & Endocrinology and Internal Medicine
  •  No malpractice claims found
  •  No sanctions found
  •  No board actions found

Awards & Recognition

  • Awards & Honors
    • Healthgrades Honor Roll
    What is a recognized doctor
  • Media & Publications

    Dr. Leffert has no media or publications listed.

Background Check

  • 0
    Malpractice Claims

    No malpractice history found for Texas.

    What is medical malpractice
  • 0

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

    What is a sanction or disciplinary action
  • 0
    Board Actions

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

    What are board actions

Board Certifications

Why It Matters: Dr. Leffert's Board Certifications

Board certification should be one of your top considerations when choosing a doctor. Board certification is an official recognition given to doctors who have met specific requirements set by national medical specialty boards in the... More

  • Diabetes, Metabolism & Endocrinology
  • Internal Medicine

Conditions Treated

  • Abnormal Thyroid
  • Acromegaly and Gigantism
  • Adrenal Gland Diseases
  • Adrenal Insufficiency
  • Autoimmune Diseases
  • Autoimmune Thyroid Diseases
  • Bone Disorders
  • Breast Diseases
  • Calcium Metabolism Disorders
  • Cancer
  • Congenital Adrenal Hyperplasia (CAH)
  • Cushing's Syndrome
  • Diabetes Insipidus
  • Diabetes Type 1
  • Diabetes Type 2
  • Diabetes With Renal Manifestations
  • Gestational Diabetes
  • Goiter
  • Graves' Disease
  • Growth Hormone Deficiency
  • Gynecomastia
  • Hashimoto's Disease
  • Hyperaldosteronism
  • Hypercalcemia
  • Hyperlipidemia
  • Hyperparathyroidism
  • Hyperthyroidism
  • Hypoglycemia
  • Hypokalemia
  • Hypoparathyroidism
  • Hypopituitarism
  • Hypothyroidism
  • Kidney Disease
  • Lipid Disorders
  • Malaise and Fatigue
  • Menstrual Disorders (incl. Dysmenorrhea)
  • Obesity
  • Osteopenia
  • Osteoporosis
  • Parathyroid (Gland) Tumor: Other than Malignant
  • Pheochromocytoma
  • Polycystic Ovarian Syndrome
  • Pregnancy-Related Disorders
  • Symptomatic Menopause
  • Testicular Dysfunction
  • Thyroid Cancer
  • Thyroid Cyst
  • Thyroid Disease
  • Thyroiditis
  • Vitamin D Deficiency


  • Medical School

    Graduated in 1983

  • Internship Hospital
    Parkland Memorial Hospital

    Completed in 1984

  • Residency Hospital
    Parkland Memorial Hospital

    Completed in 1986

  • Fellowship Hospital
    U Calif

    Completed in 1987

    U Tex SW

    Completed in 1989

Languages Spoken

  • English
  • German

Memberships &
Professional Affiliations

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


  • Internal Medicine

Procedures Performed

  • Continuous Glucose Monitoring
  • Diabetes Counseling