About
Dr. Nathan Ker, DO is a board-certified family physician with nearly 20 years of experience in Wyoming medicine. He spent most of his life in Wyoming and built much of his early career at Wyoming Medical Center, where he served as one of the original hospitalists. He eventually led the hospitalist program there as director, growing the team to 12 physicians. After a two-year period practicing in Colorado, he returned to Wyoming and served patients at Douglas County Memorial Hospital before founding RISE.
Dr. Ker co-founded RISE Direct Primary Care with his wife Emmi Ker, RN, to deliver affordable and personalized care to patients of all ages. He holds strong convictions about patient autonomy and the freedom to make individual healthcare decisions. Faith and family are central to how he approaches both his practice and his personal life. Outside the clinic, he enjoys hunting, fishing, camping, and farm life with his family. He and Emmi have four children, including a young son, and they are honored to serve the Casper community together.
Education & Training
Board Certified Family Physician
Certifications
Conditions Treated
Who is Dr. Ker right for?
Dr. Ker serves patients of all ages, from newborns to adults managing complex chronic conditions. He works well with individuals dealing with hypertension, diabetes, thyroid disease, high cholesterol, or depression who want consistent, relationship-driven care. Families looking for a single physician to cover both pediatric and adult needs find a strong fit here. Patients who value direct access to their doctor and a physician who will come to them at home will feel at home at RISE.
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Frequently Asked Questions
Dr. Ker treats a broad range of conditions including hypertension, diabetes, thyroid disease, high cholesterol, depression, obesity, seasonal allergies, and COVID-19. He also manages chronic diseases and provides preventive and urgent care for patients of all ages.
Yes. Dr. Ker holds board certification in Family Medicine. He earned that certification over a career spanning nearly 20 years of clinical practice in Wyoming.
Yes. Dr. Ker provides care for patients from newborns through adulthood. His membership plans include separate pricing for children ages 0 to 19.
Yes. Each RISE membership includes three home visits per year. Dr. Ker conducts house calls for patients within the Casper area. Travel outside Casper may involve an additional fee.
Dr. Ker builds individualized healthcare plans for each patient. He focuses on ongoing monitoring, lifestyle guidance, and medication management for conditions like diabetes, hypertension, and thyroid disease. His panel size allows him to spend meaningful time with each patient at every visit.
Dr. Ker performs a range of in-office procedures including wound repair and sutures, abscess incision and drainage, removal of benign skin lesions, ear wax removal, breathing treatments, and basic laboratory draws.
Dr. Ker practiced at Wyoming Medical Center, where he directed the hospitalist program and grew it to 12 physicians. He later practiced at Douglas County Memorial Hospital in Wyoming after a period in Colorado.
Yes. Dr. Ker offers virtual appointments for members who request them. Members also reach him directly through the Spruce Health secure messaging platform between visits.
Doctor profile last updated April 10, 2026