Irmgard Oepen (February 25, 1929 – July 9, 2018) was a German physician and medical journalist.
In 1973 she got her habilitation at the Philipps University of Marburg with a study of blood group serology.
[1][3] She published numerous articles critical of homeopathy and other alternative medical practices such as astrological health counseling.
[1][6] Oepen was one of the founding members of the Gesellschaft zur wissenschaftlichen Untersuchung von Parawissenschaften (GWUP),[7] a German group that investigates dubious scientific claims, especially in the fields of health and medicine.
In the years 1987 to 1996 she led the editorial board of the GWUP published magazine Skeptiker.