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COVID-19 Information and Updates
CareMount is now offering the COVID-19 vaccination for ages 5+ and the booster dose for individuals 18 years and older.  Read more or schedule online.
Drive-Thru COVID-19 RNA (nasal swab) testing: Read more or schedule online.

For everyone’s safety and per CDC guidelines it is MANDATORY TO KEEP YOUR MASK ON AT ALL TIMES in our offices EVEN IF FULLY VACCINATED.

Walk-In Flu Clinics ending Friday, December 3.

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Dr. Jeffrey Klein is a board-certified Reproductive Endocrinologist and Infertility Specialist, and serves as Medical Director of RMA of New York at CareMount and Tissue Bank Director of the White Plains location. Dr. Klein sees patients in both the White Plains and Mount Kisco locations. He is a speaker for various professional societies.

Dr. Klein graduated with honors from the University of Michigan. Following his undergraduate education, he received his Doctorate of Medicine from the Albert Einstein College of Medicine and completed residency training in Obstetrics and Gynecology at The George Washington University Medical Center. During residency, he was recognized for his surgical skills and was awarded the Society of Laparoendoscopic Surgeons resident achievement award. Dr. Klein developed an interest in reproductive disorders and subsequently completed a fellowship in Reproductive Endocrinology and Infertility at New York-Presbyterian/Columbia University Irving Medical Center. He has received many academic awards during his studies and training, including the prestigious Ortho-McNeil Pharmaceutical Education Award.

While at Columbia University, Dr. Klein pursued research on novel reagents for clinical use in IVF and infertility treatments. This innovative work culminated in national recognition, presentations at international meetings, and collaboration with a global pharmaceutical company. He has published both basic research and clinical reports in peer-reviewed journals as well as chapters in textbooks on a wide range of reproductive topics including IVF, reproductive aging, and egg donation.

Dr. Klein has been recognized as a Top Reproductive Endocrinologist and Infertility Specialist by Castle Connolly and in New York and Westchester Magazine’s “Top Doctors” edition every year since 2007. He has also been recognized by Super Doctors annually since 2009 as a New York Super Doctor.

Dr. Klein’s areas of expertise include treatment of infertility, IVF, egg donation, polycystic ovary syndrome (PCOS), endometriosis, recurrent pregnancy loss, and gestational surrogacy. He is a member of the American College of Obstetrics and Gynecology, the American Society for Reproductive Medicine, and the Society for Reproductive Endocrinology and Infertility.

Learn More about Dr. Klein

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White Plains Office
311 North Street
Suite 310 & Suite 401
White Plains, NY 10605


Awards & Recognition

Castle Connolly Top Doctor: 2021


Undergraduate & Graduate

University of Michigan, Ann Arbor MI: 1991

Medical Education

Albert Einstein College of Medicine, Bronx NY: 1995


The George Washington University Medical Center, Washington DC: 1999


Columbia University Medical Center, New York: 2002
Reproductive Endocrinology and Infertility

Board Certifications

Obstetrics and Gynecology
Reproductive Endocrinology and Infertility

Professional Affiliations

American Society for Reproductive Medicine
Society for Reproductive Endocrinology and Infertility
American College of Obstetrics and Gynecology


  • Ascher-Walsh C, Klein J, Sauer MV. Treating Infertility in Women of Advanced Reproductive Age. Repro Technolog 2000;10(4):184-88.
  • Lobel L, Pollak S, Klein J, Lustbader JW. High Level Bacterial Expression of Soluble Extracellular Domain of the hLH/CG Receptor in the Cytoplasm of E. coli. Endocrine 2001;14(2) 205-212.
  • Klein J, Sauer MV. Assessing Fertility in Women of Advanced Reproductive Age. Am J Obstet and Gynecol 2001;185(3):758-70.
  • Klein J, Lobel L, Pollak S, Xiao E, Ferin M, Sauer MV, Lustbader JW. Pharmacokinetics and pharmacodynamics of single-chain recombinant hFSH containing the hCG carboxyterminal peptide in the rhesus monkey. Fertil Steril 2002;77(6):1248-1255.
  • Pena JE, Klein J, Chang PL, Thornton M, Sauer MV. Successive pregnancies with delivery of two healthy infants in a couple who was discordant for human immunodeficiency virus infection. Fertil Steril 2002;78(2):421-3.
  • Klein J, Sauer MV. Oocyte donation. Best Pract Res Clin Obstet Gynaecol. 2002;16(3):277-91.
  • Lobel L, Pollak S, Lustbader B, Klein J, Lustbader JW: Expression and purification of an active extracellular domain fusion protein of the hFSH receptor in reductase mutants of E. coli. Protein expression and purification 2002;25(1):124-133.
  • Klein J, Lobel L, Pollak S, Lustbader B, Ogden RT, Sauer MV, Lustbader J. Development and characterization of a long-acting recombinant hFSH agonist.
    Hum Reprod 2003;18(1):50-56.
  • Klein J and Sauer MV. Asherman syndrome. In NORD Guide to Rare Disorders.
    Lippincott Williams & Wilkins, Philadelphia, PA, 2003.
  • Klein J , Pena JE, Thornton MH, Ruman J, Kavic S, Sauer MV. Understanding the motivations, concerns and desires of HIV-serodiscordant couples wishing to have children through assisted reproductive techniques (ART). Obstet Gynecol 2003;101:987-94.
  • Ruman J, Klein J, Sauer MV. Understanding the effects of age on female fertility. Minerva Ginecol 2003;55:117-27.
  • Pena JE, Klein J, Thornton MH, Sauer MV. Providing assisted reproductive care to male haemophiliacs infected with human immunodeficiency virus: preliminary experience. Haemophilia 2003;9:309-16.
  • Weenan C, Lobel L, Pollak S, Klein J, Pena JE, Ogden T, Palmer S, Lustbader, JW. Long-acting FSH analogues containing N-linked glycosylation exhibited increased bioactivity as compared to O-linked analogues in female rats. Accepted for publication, J Clin Endocrinol Metab, July 2004
  • Ruman J, Trousdale RK, Pollak S, Klein J, Lobo R, Lustbader JW.Effects of long-acting recombinant human follicle stimulating hormone (rhFSH) analogues containing N-linked glycosylation on murine folliculogenesis. Accepted for publication, Fertil Steril July 2004