Summary

John Leff specializes in internal medicine with additional expertise in endocrinology, diabetes, and metabolism. They earned their medical degree from State University of New York Downstate and have been practicing for 48 years. John speaks English fluently.

John practices in Brooklyn, New York, bringing decades of experience to patient care. They treat conditions such as varicose veins, venous skin ulcers, and mood disorders in children. Their expertise includes performing Doppler ultrasounds, providing counseling services, and conducting vascular studies. Patients have given John an average rating of 4.0 on Vitals.

Overview based on verified provider data

Quick Facts

  • 4
  • 48 years of experience
  • 6 insurance plans accepted
  • speaks English
  • State University of New York Downstate
  • 2 specialties
  • 1 area of expertise
  • 2 office locations

Office Locations

Dr. John Leff has 2 locations

Dr. John Leff

150 55th StBrooklyn, NY 11220

Dr. John Leff

3414 Church AveBrooklyn, NY 11203

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Dr. John LeffDr. Monte Ezratty, MDDr. Joseph Fretta, MDDr. Samih Abbassi, MD
Internal MedicineInternal MedicineInternal MedicineInternal Medicine
Accepts New Patients Accepts New Patients Accepts New Patients
3.8 
3.7 
4.8 
48 Years of Experience 49 Years of Experience 55 Years of Experience
No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option No Virtual Visit Option
Speaks English Speaks English, Spanish Speaks English, Spanish Speaks English, Arabic
Brooklyn , NYBronx , NYEatontown , NJNorth Bergen , NJ
Med School: State University of New York Downstate Med School: University Of Toledo College Of Medicine Med School: Universidad Autonoma De Guadalajara Facultad De Medicina Med School: University Of Baghdad College Of Medicine
Current Profile
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Insurance Plans Accepted by Dr. John Leff

  • Aetna Better Health
  • Elderplan
  • Fidelis Care (NY)
  • HealthFirst (NY)
  • Medicaid - Medicaid
  • Medicaid - Medicaid (Managed)

Medical Specialties

Dr. John Leff has the following 2 specialties

Specialty Expertise

Dr. John Leff has the following area of expertise

  • Endocrinology, Diabetes & Metabolism

Certifications, License, & Education

48 Years Experience

Education & Training

Medical School

Graduated from State University of New York Downstate in 1978.

NPI Number

Dr. Leff's NPI number is 1689693327.

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Frequently Asked Questions

Does Dr. John Leff accept my insurance?
You can see the insurance plans that Dr. John Leff accepts on their Vitals profile.
Is Dr. John Leff accepting new patients?
Dr. John Leff has not indicated that they accept new patients. Contact their office through their Vitals profile to check for availability.
How can I make an appointment with Dr. John Leff?
You can find contact information for Dr. John Leff here on Vitals.
Does Dr. John Leff accept virtual/telehealth appointments?
Dr. John Leff has not indicated that they accept virtual/teleheatlh appointments. Contact their office through their Vitals profile to check for availability.
Where is Dr. John Leff's office located?
Dr. John Leff's office is located at 150 55th St, Brooklyn, NY, 11220.

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