Dr. Ralf Zimmerman - American Fertility Services

Dr. Ralf Zimmermann


Dr. Ralf Zimmermann

Ralf Zimmermann MD | Retired

The Team at Neway would like to thank Dr. Zimmermann for his unwavering dedication and commitment to patient care. He worked tirelessly throughout his career to help patients with their family building journeys. We are forever grateful for having had the opportunity to work with Dr. Zimmermann. His dedication, compassion, and professionalism are exemplary, and his life long career has brought so much joy and fulfillment to countless families. We want to wish Dr. Zimmermann all the best in his well-deserved retirement. Dr. Ralf Zimmermann is a double board-certified Fertility & Reproductive Endocrinology and Obstetrics & Gynecology.

He comes from an accomplished background in Reproductive Endocrinology and Assisted Reproductive Technologies (ART), with a special interest in the psychological factors of infertility treatment. With over twenty years on the faculty at Columbia University’s Division of Reproductive Endocrinology and Infertility, he brings a commitment to clinical excellence and a high degree of patient care to our sister fertility company Neway Fertility.

Originally from Germany, Dr. Zimmermann received his Doctorate of Medicine from the University of Hamburg and is fluent in German, Spanish and French, accommodating many patients in need of fertility services that are not as readily available outside of the U.S.


Expertise & Special Interest
Assisted Reproductive Technologies (ART),
• Reproductive Endocrinology
• Obstetrics & Gynecology
• Psychiatry
• Oncofertility
• Fertility Preservation
• Psychological Factors of Infertility Treatment
• International Assisted Reproduction

Medical Degree: Universitaet Hamburg, Fachbereich Medizin
Residency in Obstetrics & Gynecology and Psychiatry at Yale University, School of Medicine
Residency in Department of Obstetrics & Gynecology at University of Hamburg and St. Elisabeth
Fellowship in Reproductive Endocrinology & Infertility at Mayo Clinic

Certifications & Professional Affiliations
• Licensed in New York, Connecticut, and Germany
• Board Certified: Obstetrics and Gynecology
• Board Certified: Fertility & Reproductive Endocrinology
• Awards: Healthgrades Honor Roll
• Previous Director of Oncofertility Columbia
• Previous Director of the Audobon Clinic of Reproductive Medicine

Insurance and Out-Of-Network Benefits

American Fertility Services understands the financial burden of fertility treatment.

Currently we are working to become in-network providers with Aetna, Cigna, UnitedHealthcare, and Empire Blue Cross Blue Shield.

In the meantime, our experienced team of financial counselors can help you understand and maximize your out-of-network insurance benefits.

If you want to speak with a financial counselor about your out-of-network options, or be notified when AFS begins accepting insurance from your provider, please fill out this form.

Our Facility

100 Putnam Green,
Greenwich, 06830, CT

Phone: (+001) 203 774-9900
Fax: (+001) 203 900-0660

Map & Directions

Office Hours
Monday - Friday:
6:30 AM - 3 PM