Meet the Doctors

Meet the Doctors at Yellowstone Sports Medicine

Our doctors at Yellowstone Sports Medicine are dedicated to providing exceptional patient care. Our team of Board Certified, Fellowship trained surgeons have a combined 50+ years of experience in treating complex Orthopedic issues in patients of all ages and abilities. We invite you to meet the doctors and learn more about the Yellowstone Sports Medicine providers.

Meet the Doctors and Physician Assistants

We invite you to meet the doctors below to learn more about the Yellowstone Sports Medicine providers.

About Doctor Jimmie G Biles

Jimmie G. Biles, MD

Dr. Biles is a board-certified and fellowship-trained Orthopedic Surgeon who has practiced orthopedic surgery in Cody, Wyoming since 1987. He started his practice in July of 1987 and founded Big Horn Basin Orthopedic Clinic and later founded Yellowstone Sports Medicine and Bone & Joint LLC.

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About Doctor J Alex Sielatycki

Alex Sielatycki, MD

Dr. J. Alex Sielatycki is a board-certified and fellowship-trained Orthopedic Spine Surgeon. He has extensive training and experience in the treatment of spinal conditions such as Stenosis or bulging disc, radiculopathy or pinched nerves of the spine, Spondylolisthesis or slipping of the vertebrae, disc degeneration, Spine fractures, and other painful conditions of the spine.

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About Jill Mayhew, FNP-BC

Jill Mayhew, FNP-BC

Jill Mayhew, FNP-BC was raised in the small town of Abbott, Texas. After earning her Bachelor of Science in Nursing from the University of Texas at Arlington, she went on to build 14 years of diverse experience across the healthcare continuum.

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What Our Patients Are Saying

June B.


He’s done 2 surgeries on my husband’s knees. He tore his meniscus on both knees within a little over a month. Dr. Biles is awesome. He explained what the problem was and how he would repair it. After surgery, he explained what they had to do, everything they saw, and everything they had to repair. Dr. Biles was very thorough and did an awesome job.

Barry D.


Dr. Biles is an outstanding surgeon. I recently had my knee replaced and it was much easier than I had imagined. I have never had a doctor who was so “in tune” with his patients. He spent a great deal of personal time with me and was always very available. If I could give a rating of 10, that is what I would give Dr. Biles. He has an outstanding staff as well.

John A.


A multi-year patient of Dr. Biles and the Team at YSM in addressing a number of orthopedic issues. Very happy with the care and professionalism of the entire practice and highly recommend them to others.

Susie W.


Dr. Biles and his staff are so amazing!!! I am so thankful to them. They went above and beyond with hearts of gold. Dr. Biles is more than just a great doctor, he is truly a caring, compassionate man with a beautiful soul.

Calvin E.


Very professional and personal care.

How We Can Help

How We Can Help

Don’t let pain or injury hold you back from living an active, fulfilling life. Request an appointment today with Dr. Biles and his team. Call us at 307-578-1953 or contact us to learn more about how we can help you achieve optimal musculoskeletal health.

No Referral from an outside doctor is needed for an appointment at Yellowstone Sports Medicine.

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