Mason Stillman, MD

About Mason

Gillette native Mason Stillman, MD, joins CCH Behavioral Health Services as a psychiatrist, providing both inpatient and outpatient care for adults.

Dr. Stillman specializes in treating the full spectrum of adult mental health needs, with a special focus on more severe and persistent conditions such as psychosis and bipolar disorder. He finds this work especially rewarding because of the meaningful difference it can make in people’s daily lives.

Dr. Stillman earned his medical degree from the University of Washington through the WWAMI Wyoming program and completed his adult psychiatry residency at Dartmouth Hitchcock Medical Center in New Hampshire.

His passion for medicine began early in life, inspired by his younger brother’s premature birth and the exceptional care his family received right here at Campbell County Memorial Hospital. Over time, his interest in how people think, feel, and experience the world led him to psychiatry. “The part I enjoy most is hearing people’s stories and helping them work toward the changes they want in their lives,” said Dr. Stillman.

Outside of work, Dr. Stillman enjoys spending time with his family, being outdoors, fishing, hiking, and following his favorite sports teams.