William D. Ketcham, M.D.

In 2002, Dr. Ketcham moved from Texas to begin offering his medical services at Cheyenne Radiology. In his spare time, you can find Dr. Ketcham piloting small planes through the Wyoming sky or rescuing pit bulls from animal shelters. Recently, he has become more interested in hockey and likes to watch Cheyenne’s minor league team play. He spends most of his time off, however, enjoying the small pleasures of life with his wife and two children.
- internship
- Internal Medicine, University of Nevada Affiliated Hospitals
- residency
- Internal Medicine, University of Nevada Affiliated Hospitals
- medical
- University of Nevada
MarkHowshar
Dr. Howshar’s schooling and professional experience have taken him to California, Tennessee, Missouri and elsewhere, but he’s happy to be back in his home state working with Cheyenne Radiology. A native of Wheatland, Dr. Howshar was accepted to medical school immediately after high school in a combined BA/MD program at the University of Missouri in Kansas City. Thus, following his father into the world of medicine. He started with Cheyenne Radiology when he moved to the city in 2010.
DanielPossehn
Dr. Daniel R. Possehn began with Cheyenne Radiology Group in 2005, after finishing a neuroradiology fellowship in California. Although Dr. Possehn can usually be found with a cup of coffee in his hand, don’t try to offer him a mug of instant joe—he’s more of a coffee connoisseur than a caffeine junky. When he’s not at work or traveling to remote destinations, he can be found jamming on the drums or enjoying a walk with his wife and their four-legged child Bear, a golden retriever.

