About Mitch Rein, MD

Mitchell S. Rein, MD, is a member of the Department of Obstetrics and Gynecology (OBGYN) at Mass General where he practices infertility and assisted reproductive technologies and gynecology as a part of the Mass General/North Shore OBGYN practice. He is an Associate Professor in Obstetrics, Gynecology and Reproductive Biology at Harvard Medical School and has published extensively on the topics of uterine fibroids, infertility and quality improvement.  Dr. Rein served as the Chief Medical Officer and Senior Vice President of Medical Affairs at Salem Hospital from 2004 to 2023 and as the Chair of the Department of Obstetrics and Gynecology from 1997 – 2006.  

Dr. Rein is a fellow in the American College of Obstetrics and Gynecology, Division of Reproductive Endocrinology. He is also a member of the American Society of Reproductive Technologies, the American College of Physician Executives, the Obstetrical Society of Boston, the New England Obstetrical Society and the Mass Medical Society.

Dr. Rein received his medical degree from Duke University School of Medicine. He completed a residency specializing in obstetrics and gynecology and a fellowship in reproductive endocrinology and infertility at Brigham and Women's Hospital.


Clinical Interests:



Danvers: The Mass General/North Shore Center for Outpatient Care

Mass General Obstetrics & Gynecology at Mass General/North Shore Center for Outpatient Care
102-104 Endicott St.
Suite 304
Danvers, MA 01923
Phone: 978-882-6767

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Medical Education

  • MD, Duke University School of Medicine
  • Residency, Brigham and Women's Hospital
  • Fellowship, Brigham and Women's Hospital

American Board Certifications

  • Obstetrics & Gynecology, American Board of Obstetrics and Gynecology
  • Reproductive Endocrinology & Infertility, American Board of Obstetrics and Gynecology

Accepted Insurance Plans

Note: This provider may accept more insurance plans than shown; please call the practice to find out if your plan is accepted.


  • Quality Improvement / Patient Safety
  • Infertility Clinical Trials
  • Pathogenesis of Uterine Leiomyoma


  • Rein, M.S., Friedman, A.J., Heffner, L. Decreased prolactin secretion by explant cultures of fibroids from women treated with a gonadotropin releasing hormone agonist., J. Clin. Endocrinol. Metab. (1990) 70:1554-1558 Rein, M.S., Friedman, A.J., Barbieri, R.L., Pavelka, K., Fletcher, J.A., Morton, C.C. Cytogenetic abnormalities in uterine leiomyomata. Obstet. Gynecol. (1991) 77: 923-926

    Rein, M.S., Barbieri, R., Friedman, A. Progesterone: A critical role in the pathogenesis of uterine myomas. Am. J. Obstet. Gynecol. (1995) 172:14-18

    L. Riley MD*, M. Appollon, MD, S. Haider MD MPH, S. Chan-Flynn CMN, MPH* A. Cohen, J. Ecker MD, M. Rein MD***, E. Liberman MD DrPh. J. Perinat.- (2003-06); 23 (4): 272-277

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