Dr. John Leff, MD

Dr. John Leff, MD

Endocrinology, Diabetes & Metabolism  |  
Male  |  
Age 69
Insurances AcceptedSave
Dr. John Leff, MD is an endocrinology, diabetes & metabolism doctor who practices in Brooklyn, NY. He is 69 years old and has been practicing for 39 years. Dr. Leff is affiliated with Montefiore Medical Center.

150 55th St

Brooklyn, NY 11220

Contact Information

(718) 630-7942

Insurance Accepted

  • Cigna

*Please verify this information when scheduling an appointment.

Learn about Dr. Leff

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

new

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

Diabetes Type 2
very high
more than 99% of peers
Thyroid Disease
very high
more than 93% of peers
Hypothyroidism
high
more than 89% of peers

Dr. Leff'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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1

Specialties

  • Endocrinology, Diabetes & Metabolism
1

Board Certifications

  • Diabetes, Metabolism & Endocrinology
    Accredited by: American Board of Internal Medicine*
50

Conditions Treated

  • Abnormal Thyroid
  • Acromegaly and Gigantism
  • Adrenal Gland Diseases
  • Adrenal Incidentaloma
  • Adrenal Insufficiency
  • Autoimmune Diseases
  • Autoimmune Thyroid Diseases
  • Benign Tumor
  • Bone Disorders
  • Breast Diseases
  • Calcium Metabolism Disorders
  • Cancer
  • Congenital Adrenal Hyperplasia (CAH)
  • Craniopharyngioma
  • Diabetes Insipidus
  • Diabetes Type 1
  • Diabetes Type 2
  • Diabetic Macular Edema (DME)
  • Diabetic Retinopathy
  • Female Infertility
  • Goiter
  • Graves' Disease
  • Hashimoto's Disease
  • Hypercalcemia
  • Hyperkalemia
  • Hyperlipidemia
  • Hyperparathyroidism
  • Hyperthyroidism
  • Hypokalemia
  • Hypopituitarism
  • Hyposmolality and Hyponatremia
  • Hypothyroidism
  • Kidney Disease
  • Lipid Disorders
  • Malaise and Fatigue
  • Male Infertility
  • Menstrual Disorders (incl. Dysmenorrhea)
  • Obesity
  • Osteopenia
  • Osteoporosis
  • Overweight
  • Polycystic Ovarian Syndrome
  • Pregnancy-Related Disorders
  • Retina Diseases
  • Symptomatic Menopause
  • Testicular Dysfunction
  • Thyroid Cancer
  • Thyroid Disease
  • Thyroiditis
  • Vitamin D Deficiency

More

Read More
1

Procedures

  • Diabetes Counseling

Background Check

0 Malpractice Claims

No malpractice history found for New York.

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.

Education

  • SUNY Downstate Medical Center College Of Medicine
    Medical School | Graduated 1978
  • Staten Island Hospital
    Internship Hospital | Completed 1979
  • Staten Island Hospital
    Residency Hospital | Completed 1981
  • Joslin Diab Ctr/New Deaconess Hospital
    Fellowship Hospital | Completed 1987
  • SUNY Downstate Med Center
    Fellowship Hospital | Completed 1983

Awards & Recognition

Awards & Honors
  • Healthgrades Honor Roll
Media & Publications

Dr. Leff has no media or publications listed.

Languages Spoken

  • English

Memberships & Professional Affiliations

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

Dr. Leff's Reviews

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Visit Dr. Leff

Now Accepting New Patients
Dr. Leff accepts 1 insurance carrier
  • Cigna
    Cigna HMO
    Cigna PPO
    Open Access Plus

*Please verify this information when scheduling an appointment.

Hospitals where Dr. Leff has admitting privileges

Montefiore Medical Center
111 E 210th St
Bronx, NY 10467
View Hospital Profile

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