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Obstetrician & Gynecologist (OB/GYN), Endocrinologist (diabetes, hormones)
34 years of experience
Video profile
Accepting new patients
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 (2)

The overall average patient rating of Dr. Ralf Zimmermann is Excellent. Dr. Zimmermann has been reviewed by 3 patients who have provided 2 comments. The rating is 5 out of 5 stars.

Patient Ratings
Ease of Appointment 4.6
Promptness 4.6
Courteous Staff 4.6
Accurate Diagnosis 5.0
Bedside Manner 5.0
Spends Time with Me 5.0
Follows Up After Visit 5.0

Specialties & Research

  • He has special expertise in 15 areas:
  • Adolescent Medicine
  • Amenorrhea
  • Artificial Insemination
  • Assisted Reproductive Techniques
  • Diabetes
  • Endometriosis
  • Female Infertility
  • Fertility
  • Hormone Replacement Therapy (HRT)
  • In Vitro Fertilization (IVF)
  • Laproscopic Surgery (Laparoscopy)
  • Male Infertility
  • Menopause
  • Ovulation Induction
  • Reproductive Medicine

Education & Awards

Dr. Zimmermann graduated from Universitaet Hamburg.


Dr. Zimmermann has 11 hospital affiliations:

  • NewYork-Presbyterian / Weill Cornell 
  • New York Presbyterian Hospital / Columbia 


  • Chinese
  • Hebrew
  • Korean
  • French
  • Spanish
  • German

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Additional Information
Dr. Ralf DR Zimmermann MD is a male Reproductive Endorinologist, has 34 years of experience and practices in Reproductive Endocrinology.
Where does Dr. Ralf D. Zimmermann practice?
Dr. Ralf Zimmermann has 2 office locations.
Dr. Ralf Zimmermann practices Reproductive Endocrinology near New York, NY.
Additional practice locations include: West Harrison, NY.
See New York Obstetricians & Gynecologists.