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Dr. Mark Hornstein, MD

OBGYN physician, Boston, MA

Brigham Fertility / Beth Israel Deaconess

Dr. Mark Hornstein is an OBGYN physician at Mass General Brigham specializing in reproductive endocrinology and infertility.

55 Fruit St, Boston, MA 02114

Facts on this page last checked November 2026. How we check doctors

About Dr. Hornstein

Dr. Hornstein is a physician at Mass General Brigham specializing in obstetrics and gynecology and reproductive endocrinology and infertility, with locations in Newton and Boston. He has held the title Professor of Obstetrics, Gynecology and Reproductive Biology at Harvard Medical School and the Kosasa Family Endowed Chair in Obstetrics and Gynecology. He has served as Director of the Division of Reproductive Endocrinology and Infertility in the Department of Obstetrics and Gynecology at Brigham and Women's Hospital.

He earned his medical degree at the University of Cincinnati College of Medicine in 1982. He completed an internship in 1983 and a residency in 1986 in obstetrics and gynecology, and a reproductive endocrinology fellowship in 1988, all at Brigham and Women's Hospital. He served as Administrative Chief Resident in the Brigham and Women's Hospital and Massachusetts General Hospital Integrated Residency Program.

His research interests are the medical management of endometriosis and predictors of success and national trends in in vitro fertilization. He is the author of more than 150 original reports, reviews, book chapters and abstracts.

Membership and fees

Fees are not published. Ask the practice.

Services

Reproductive endocrinology and infertility
What reproductive endocrinology and infertility doctors commonly treat

Education and credentials

Degree
MD
Medical school
University of Cincinnati College of Medicine (1982)
Internship
Obstetrics and Gynecology, Brigham and Women's Hospital (1983)
Residency
Obstetrics and Gynecology, Brigham and Women's Hospital (1986)
Fellowship
Reproductive Endocrinology, Brigham and Women's Hospital (1988)
Board certification
Reproductive Endocrinology and Infertility, and Obstetrics and Gynecology (American Board of Obstetrics and Gynecology)
Other certification
National Board of Medical Examiners
Professional memberships
Fellow of the American College of Obstetricians and Gynecologists, American Society for Reproductive Medicine, New England Fertility Society, Massachusetts Medical Society
License
Massachusetts
Board actions
Good standing (checked Nov 2026) None on record Verify with the Massachusetts Board of Registration in Medicine
NPI
1720038276

Hospital and practice affiliations

Mass General Brigham, locations in Newton and Boston

Location

Recognition and research

Awards

Recipient of the Partners in Excellence Award, the Mass General Brigham Pillars of Excellence Award and the ASRM Arnold P. Gold Foundation Humanism in Medicine Award for Practicing Physicians.

Teaching and research roles

Research interests are the medical management of endometriosis and predictors of success and national trends in in vitro fertilization.

Patient reviews

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Questions patients ask

Is Dr. Hornstein board certified?

Yes. Dr. Hornstein is board certified in reproductive endocrinology and infertility and in obstetrics and gynecology by the American Board of Obstetrics and Gynecology.

Where did Dr. Hornstein train?

Dr. Hornstein earned his medical degree at the University of Cincinnati College of Medicine in 1982. He completed his internship, residency and a reproductive endocrinology fellowship at Brigham and Women's Hospital.

Where does Dr. Hornstein see patients?

Dr. Hornstein has locations in Newton and Boston.

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