Catherine G. Dieffenbach, M.D.

Catherine G. Dieffenbach, M.D.

Catherine G. Dieffenbach, M.D.

Catherine G. Dieffenbach, M.D. joined IGO Medical Group in September 2023. Dr. Dieffenbach received her bachelor's in science from Duke University with a major in Biological Anthropology and Anatomy, where she was also a member of the varsity swimming team for Duke and received multiple scholar athlete recognitions. She completed her medical degree at University of California, San Diego. Dr. Dieffenbach completed an internship year in General Surgery at the Brigham and Women’s Hospital/Harvard in Boston, followed by and OBGYN residency at Beth Israel Deaconess Medical Center/Harvard in Boston. During her time as a resident, she received multiple awards for resident and medical student teaching. She went on to join the junior faculty at Harvard as an instructor, taking a job in a private practice/academic role with Harvard Vanguard Medical Associates/Atrius Health. Dr. Dieffenbach is a La Jolla native and couldn’t wait to return home after almost 10 years in Boston, to join IGO and raise her family.

Educational Background

Undergraduate: Duke University, Durham, North Carolina

Medical School: University of California San Diego, La Jolla, California

Residency: Brigham and Women’s Hospital, Beth Israel Deaconess Medical Center, Harvard, Boston Massachusetts

Board Certification

Diplomat, American Board of Obstetrics and Gynecology

Professional Affiliations and Societies

Member, American Congress of Obstetricians and Gynecologists

Member, Massachusetts Medical Society

Professional Interests

Dr. Dieffenbach's private practice specializes in comprehensive healthcare for women including obstetrics, general gynecology, menopause and gynecologic surgery. She has a particular interest in preventative medicine and contraception. She is fluent in Spanish.