Mark P. Leondires, MD, MD

Founder & Medical Director

4.220 ratings on Healthgrades · as of Nov 2026

This rating is for the doctor.

Founder and medical director of Illume Fertility since 2002, known nationally for inclusive, evidence-based fertility care and for leadership in LGBTQ+ family building and donor conception.

Specialties

LGBTQ+ Family Building

Practice locations

Illume Fertility

761 Main Avenue, Suite 200 Norwalk, CT 06851

Call (203) 750-7400 View profile

Education

Colby College, BS
University of Vermont College of Medicine, MD
Maine Medical Center Residency Program, OB/GYN
National Institutes of Health, Fellowship in Reproductive Endocrinology and Infertility

Board certifications

Obstetrics and Gynecology
Reproductive Endocrinology and Infertility

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Checked against the clinic's website · Nov 5, 2026 · How we verify

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