About 20 Mile Urgent Care

We are pleased to be able to serve Parker as both an urgent care as well as a family medicine clinic. We provide a myriad of services to get you well and keep you healthy.

As a family medicine clinic we manage and treat chronic medical conditions, i.e.: diabetes, high blood pressure and elevated cholesterol as well as most other conditions that require close follow up. We also make it a top priority to focus on preventative health care by reviewing with our patients, at each age appropriate visit, the need for things like mammograms, pelvic exams, prostate evaluations, and colonscopy.

We provide services for well child checks, well woman exams, school and sports physicals and can perform simple lab tests in-house or send the labs out when necessary. We have state-of-the-art electronic medical records, which have been shown to improve medical management and decision-making and are able to easily refer patients to specialists for additional evaluations.

As an urgent care clinic, we diagnose and treat acute illnesses and injuries as well as sports injuries. We have a digital x-ray unit on-site and trained staff who know how to take the x-rays as well as interpret them. We can do all kinds of procedures including IV’s, suturing, joint injections and aspirations, ingrown toenail repair, pregnancy tests, biopsies, and many other tests and procedures.

For urgent care visits there is no appointment necessary. For family medicine visits we ask that you make an appointment, being seen the same day in most cases, to serve you better.

You will find our staff and clinic to be very warm and friendly and hope that you will feel comfortable and should the need arise, come back to see us.

Meet Dr. Morrison

Dr. Steve Morrison D.O.

Dr. Morrison grew up in Snohomish, Washington, just outside Seattle. He obtained his undergraduate degrees in Cellular Biology and Spanish from the University of Washington, where he lettered in football as a wide receiver.

Steve attended medical school in southern California at the Western University of Health Sciences of the Pacific, and completed his residency at the University of Southern California. It was there that he met his future wife, Julie, who was studying dental hygiene at USC. They met on a blind date, and were married a year later.

After they both graduated in 2003, they moved to Colorado. They now live in Parker with their three children. They love spending time with their kids riding bikes, skiing, fishing, and enjoying all that Colorado has to offer.

Cora Mattie

Physician Assistant, Certified

Ms. Mattie grew up in Wisconsin and fell in love with Colorado in high school after spending time hiking and mountain biking in Crested Butte. She received her bachelor’s degree in psychology at Colorado College in 2003 and went on to obtain a Master’s in Physician Assistant Studies from Pacific University in Oregon in 2007.

Cora initially started practicing medicine in a rural underserved area in Iowa where she specialized in Emergency and Urgent Care Medicine for just under 5 years before moving back to Colorado in 2011. She has been practicing Family and Urgent Care Medicine around the Denver area over the past 7 years.

Being back in Colorado allows her to enjoy running, hiking with her golden retriever named Keely, and skiing.

Kelly King

Physician Assistant, Certified

Kelly grew up in Longmont, Colorado, and attended University of Colorado Boulder where she received her Bachelor’s degree in Environmental Science in 2013 and also competed in cross-country and track and field. Kelly went on to get her Masters in Physician Assistant Studies from Midwestern University in Arizona in 2017.  

Kelly started her career practicing medicine by completing a fellowship in critical care medicine at Mayo Clinic Hospital in Phoenix, AZ, and went on to practice critical care medicine in the surgical trauma ICU at University of Colorado Hospital. Kelly is excited to have transitioned to preventative and urgent care medicine and become a member of the 20 Mile team.

 In her free time, Kelly enjoys trail running, racing marathons, mountain biking, and any activity that involves the outdoors



We are open:
8 a.m. to 9:30 p.m. M-F
8 a.m. to 5:30 p.m. S-S
Please call ahead for holiday hours.


We are in the Office Depot shopping center at the intersection of 20 Mile Road and Parker Road in Parker Colorado.
11355 S. Parker Road, Suite 103



Office: 720-974-7210
Billing Office: 303-699-5355
Fax: 720-851-1215

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