About Dr. Chang

Mary C. Chang, DO

Dr. Chang has held a private OB/GYN practice since 1996. A former Major in the U.S. Army Medical Corps, she received her internship and residency training from Walter Reed Army Medical Center’s Department of Obstetrics and Gynecology, where she also served on the teaching faculty. In 2006 she was named chief of the OB/GYN Department at Methodist Memorial Hospital in San Antonio, Texas.

As a member of the American Society of Minimally Invasive Surgery, Dr. Chang uses these techniques when she performs surgery for urinary incontinence, pelvic prolapse, pelvic reconstruction and hysterectomies. She is a doctor of osteopathy and an OB/GYN, with more than 20 years experience in the OB/GYN field.

With three office locations in Newburyport, Haverhill and Georgetown, the Women’s Health Care practice is a team of board-certified physicians treating a full range of OB/GYN needs, from standard checkups to surgery, as well as pregnancy, childbirth and midwife support.


Board Certification

American Board of Obstetrics and Gynecology

Medical School

Chicago College of Osteopathic Medicine, Chicago, IL


Walter Reed Army Medical Center, Dept. of OB/GYN, Washington, DC


Walter Reed Army Medical Center, Dept. of OB/GYN, Washington, DC


  • Obstetrics and Gynecology
  • Gynecology

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