Dr. Callhoun is a 1979 Distinguished Graduate of the United States Air Force Academy and graduated from the University of Iowa Medical School with an MD in 1983. Dr. Calhoun completed his residency in OB/GYN at the University of Missouri-Columbia in 1987 and finished a Fellowship in Maternal- Fetal Medicine at the Oregon Health Sciences University in 1989. Dr. Calhoun is a diplomat of the American Board of Obstetrics and Gynecology with board certification in general Obstetrics and Gynecology and in the sub-specialty of Maternal-Fetal Medicine. He also is also board certified in Addictions Medicine.
He has authored 80 peer review articles in the obstetric and gynecologic literature, presented over 100 scientific papers, participated in over 40 research projects, and has published numerous articles on medical aspects of obstetrics and gynecology.
Dr. Calhoun serves as Professor and Vice-Chair in the Department of Obstetrics and Gynecology at the West Virginia University-Charleston and is directly involved in resident and medical student education. He is licensed in several states and continues to actively practice maternal-fetal medicine, perform diagnostic obstetrical ultrasound, participate in prenatal diagnosis counseling, and provide education to residents and medical students.