Hospital Affiliation: Stamford Hospital

David B. Weinstein, M.D.

Dr. Weinstein graduated from Yale University before going on to earn his medical degree from Chicago Medical School. A native New Yorker, he then returned home to complete his internship at Mt. Sinai Hospital and later joined New York Hospital-Cornell Medical Center for his residency. Dr. Weinstein has since been appointed to the faculty of New York Hospital, Westchester Medical Center and Stamford Hospital. He has conducted specialized research in his area of expertise, obstetrics and gynecology.

A member of many obstetrical and gynecological societies, Dr. Weinstein is certified by the American Board of Obstetrics and Gynecology. He was declared one of the "Best Doctors in America" for 1996-1997. He received recognition as one of the "Top Doctors New York Metropolitan Area" for six years running (1998-2003). Recently, he received an award of "America's Top Obstetricians and Gynecologists" for 2004-2005.

Dr. Weinstein has served his country as a lieutenant commander in the United States Navy. He is also a member of the Connecticut Advisory Board of the American College of Obstetricians and Gynecologists.

Dr. Weinstein joined Obstetrics and Gynecology Associates in 1976


Gary S. Besser, M.D.

Before earning his medical degree from Downstate University, Gary S. Besser, M.D. completed his undergraduate studies at Syracuse University, post-graduate studies at the Massachusetts Institute of Technology, and a research fellowship at Hadassah Medical Center, Hebrew University in Jerusalem. He then joined Stamford Hospital to complete his residency in 1986 and received board certification from the American Board of Obstetrics and Gynecology in 1988. He is appointed to the Stamford Hospital. Dr. Besser specializes in laparoscopic surgeries, the evaluation of Pap smear abnormalities and urogynecologic procedures. He is the first physician in Stamford to utilize the da Vinci robotic platform surgery for hysterectomies and myomectomies, having gone on to perform close to 3,000 of these minimally invasive procedures.

A Diplomate of the American Board of Obstetrics and Gynecology and a member of numerous medical associations and obstetrical and gynecological societies, Dr. Besser was selected one of the "Top Doctors in the New York Metropolitan Area" for eight of the past ten years (most recently, 2010), named one of "The Best Doctors in New York" in 2002, 2004 & 2008 by New York Magazine, and Connecticut Magazine's Best Doctor 2010.

Dr. Besser has an academic appointment at Columbia Presbyterian Hospital and he serves on the Connecticut State Maternal Mortality Committee. He has also received an award recognizing him as one of "America's Top Obstetricians and Gynecologists."

Dr. Besser joined Obstetrics and Gynecology Associates in 1987.


Lisa A. Dishongh, M.D.

Dr. Dishongh carried out her undergraduate studies at Texas A&M University, graduating with degrees in biology and psychology, and then earned her medical degree from University of Texas in 1986, garnering several academic honors along the way. She continued her training at Stamford Hospital, completing her residency there in 1990.

A member of the American Medical Association, Dr. Dishongh received board certification from the American Board of Obstetrics and Gynecology in 1990. She is a member of several medical societies.

Dr. Dishongh joined Obstetrics and Gynecology Associates in 1990.


George Edward Heading, M.D.

Dr. Heading earned his undergraduate degree in biology from Columbia College and continued his education at New York Medical College, where he received his medical degree in 1990. He completed his residency in 1994 at Stamford Hospital and was certified by the American Board of Obstetrics and Gynecology in 1996.

Dr. Heading is a member of several professional societies and hospital committees. He specializes in laparoscopic surgery, the evaluation of Pap smear abnormalities and urogynecologic procedures.

Dr. Heading joined Obstetrics and Gynecology Associates in 1994.


Astrid Hoffmann-Olsen, M.D.

After earning a degree in nursing from Western Kentucky University and completing her undergraduate studies at Middle Tennessee State University, Dr. Hoffmann attended James H. Quillen College of Medicine and received her degree in 1991. She completed her internship and residency at Stamford Hospital and was certified by the American Board of Obstetrics and Gynecology in 1997.

Dr. Hoffmann is a member of the American Medical Association and several other professional societies, including a number of local medical associations.

Dr. Hoffmann joined Obstetrics and Gynecology Associates in 1999.


Elaine M. Morganelli, M.D.

Dr. Morganelli earned her undergraduate degree in biology from Trinity College. She then earned her medical degree from St. George's University School of Medicine in 2002. She completed her internship at The Stamford Hospital, Columbia University in 2005 and her residency at The Stamford Hospital, Columbia University in 2006.

Dr. Morganelli is active in obstetrical and gynecological societies and has been recognized by the American College of Obstetrics & Gynecology; Resident Report in 2005.

Dr. Morganelli joined Obstetrics and Gynecology Associates in 2006.


Marjan Hedayatzadeh, M.D.

Dr. Hedayatzadeh carried out her undergraduate studies at University of California, Irvine, graduating with a degree in biology, and then earned her medical degree from Ross University School of Medicine in 2005. She continued her training at University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School, through 2010.

During 2010, Dr. Hedayatzadeh was bestowed the Gold Humanism Award for Patient Care & Medical Student/Resident Teaching, by University of Medicine and Dentistry of New Jersey.

Dr. Hedayatzadeh joined Obstetrics and Gynecology Associates in 2010.

Key Office Staff

Lily Chan
Practice Manager

Vanessa Lucas, M.A.
Clinical Manager

Gabriella Alzate, RDMS
Ultrasound Technician

Judith Stile
Mammography Supervisor