About Us

Urgent Care of Colorado is a locally owned, family-friendly, urgent care facility located in Littleton, Colorado. We have been healing patients in Colorado for more than 9 years. We provide the highest quality of patient focused care for patients of all ages from newborns to the elderly. Healing is our passion. 

We strive to provide high quality, patient focused care. While there are other urgent care facilities in the greater Denver area, none of them can match Urgent Care of Colorado’s capable, compassionate care.

Meet Our Staff

William Cooper, M.D.

Dr. William Cooper is a board certified family physician who treats patients at Urgent Care of Colorado. He grew up in Virginia Beach, Virginia. He studied German literature, Russian, and the premedical sciences at the University of Virginia where he received a BA with distinction in 1986. He deferred medical school for one year to travel and work abroad in Germany, France, Austria, Namibia, and Botswana. Dr. Cooper returned to medical school at the University of Virginia, where he received his M.D. in 1991. 

He then went on to complete his residency in family practice at Bayfront Medical Center in St. Petersburg, Florida in 1994. He has been a doctor in Colorado since 1995. 

Outside of medicine, Dr. Cooper loves to spend time with his wife and children. He also enjoys snow skiing, playing traditional Irish music on the flute, hiking and watching his sons play Lacrosse.

Kallie French, PA-C

Kallie French aspired to be a Physician Assistant her entire life. This dream led her to enroll at Southern Illinois University, where she completed both her undergraduate degree and her Master's in Physician Assistant Studies. She quickly started treating patients in both Family Practice and Urgent Care settings, earning a reputation as a confident, thoughtful, and compassionate provider.

Susan Sipay, M.D.

Dr. Sipay has been providing quality urgent care to Denver area residents since 2004, when she relocated to Colorado after spending five years in St. Paul, Minnesota, working in Emergency Medicine. She graduated from Purdue University and earned her MD at Rush Medical College. Dr. Sipay is board certified in Emergency Medicine and was honored as a Public Health Champion for her efforts to stem the spread of the H1N1 influenza outbreak.                                                                             

Dr. Sipay loves to spend time outdoors. Skiing, snowboarding, hiking, and biking are among her favorite activities.