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License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Patient Reviews

Patient comments (38)

The overall average patient rating of Dr. Mark Leondires, Fertility, Reproductive Endocrinology is Good. Dr. Leondires has been reviewed by 66 patients who have provided 38 comments. The rating is 4 out of 5 stars.

Patient Ratings
Ease of Appointment 4.5
Promptness 4.3
Courteous Staff 4.2
Accurate Diagnosis 4.0
Bedside Manner 4.0
Spends Time with Me 4.1
Follows Up After Visit 4.0

Specialties & Research

Dr. Mark Leondires, MD is board certified in Reproductive Endocrinology.

  • He has special expertise in 18 areas:
  • Acupuncture
  • Amenorrhea
  • Artificial Insemination
  • Couple's Therapy
  • Diabetes
  • Embryo Transfer
  • Endocrine Disorders
  • Endometriosis
  • Female Infertility
  • Hysteroscopic Surgery
  • In Vitro Fertilization (IVF)
  • Laproscopic Surgery (Laparoscopy)
  • Miscarriage (Recurrent)
  • Ovulation Induction
  • Polycystic Ovary Syndrome (PCOS)
  • Premature Ovarian Failure
  • Sperm Donation or Egg Donation (Oocyte Donation)
  • Superovulation

Education & Awards

Dr. Leondires graduated from University of Vermont, Burlington. He has 3 awards.

Castle Connolly Top Doctors: New York Metro Area™ (2014 - 2015)
On-Time Doctor Award (2014 - 2015)
Nominated "Best Doctors in America" (2011-2012) "Best Doctors in America" represents the top five percent of physicians across the country *


Dr. Leondires has 6 hospital affiliations:

  • Danbury Hospital 
  • Greenwich Hospital Association 


  • Portuguese
  • Spanish

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Additional Information
Dr. Mark Leondires MD is a male Reproductive Endorinologist, has 21 years of experience and practices in Reproductive Endocrinology.
Where does Dr. Mark Leondires practice?
Dr. Mark Leondires has 5 office locations.
Dr. Mark Leondires practices Reproductive Endocrinology near Norwalk, CT.
Additional practice locations include: Trumbull, CT and Poughkeepsie, NY.
See Norwalk Obstetricians & Gynecologists.