Some of the content on this website requires JavaScript to be enabled in your web browser to function as intended. While the website is still usable without JavaScript, it should be enabled to enjoy the full interactive experience.

Skip to Main Content

Family Medicine Residency Program-Cheyenne|University of Wyoming

Contact Us

Resident Inquiries
Deb Frew
Residency Coordinator
Phone: 307-777-7911 ext. 100
Fax: 307-638-3616
Cheyenne, WY 82001
Patient Inquiries
821 East 18th Street
Cheyenne, WY 82001
Phone: 307-632-2434



Samina Ayub, M.D.
Samina was born and raised in India.  After completing high school she immigrated to California, where she studied Cognitive Science at the University of California, Berkeley.  Samina received her degree in Medicine from All Saints School of Medicine in Dominica.  She is an internship away from receiving her MPH degree from Benedictine University, IL.  She is interested in practicing as a family physician because it will provide her with the flexibility to practice internationally and serve underserved communities.  Outside of medicine Samina enjoys reading, tennis, bowling and spending time with friends and family.


Brad Jepson, M.D.
Brad grew up in Bozeman, MT.  He has a Bachelor of Arts in Psychology from Middlebury College.  He earned his MD degree at University of Colorado Denver School of Medicine.  Brad appreciates the broad scope of Family Medicine and has particular interests in preventive medicine and sports medicine.  He feels lucky to be part of a residency program that has tremendous support from its faculty and staff, as well as the greater community.  He loves golf, tennis, hiking, biking and skiing.


Jeremy Kessler, M.D.
Jeremy was born and raised just outside of New York City, and received his undergraduate degree from the State University of New York at Albany with a major in biology and a minor in business.  He spent the following year in Albany, New York doing research and environmental analysis that was published in a study on the integrity of wetland ecosystems.  With the desire to make a larger impact on society, his path lead him back to the city where he worked for three years at Long Island Jewish Hospital in the operating room as a Laparoscopic Technician.  With this exposure to patient care, in depth surgical procedures and groundbreaking medicine, he was motivated to go back to school at night to complete pre-requisites for medical school.  He subsequently went to medical school at the Universidad Autonoma de Guadalajara in Guadalajara, Mexico, completing his training through the New York Medical College in Westchester, NY.  While training in Mexico, Jeremy participated in numerous surgical brigades and medical missions by volunteering his time to provide much needed health care and surgeries to the underprivileged communities of Central America, focused in Mexico and Guatemala.  Jeremy went on to complete a one-year surgical residency program in the University of Florida at Gainesville.  His desire to be more involved and hands on with the community and to practice broad-spectrum medicine lead him to the UW Family Medicine Residency Program.  Jeremy enjoys the outdoors in his free time; playing soccer, camping, hiking, fishing, rock climbing, mountain biking, snowboarding and surfing.  Jeremy also enjoys playing guitar, listenting to music, especially live show, concerts or music festivals.


Casey Miller, M.D.
Casey was raised in Greensboro, North Carolina.  He attended North Carolina State University and graduated Summa Cum Laude with a Bachelors of Science in Biology.  While in undergrad, he worked in the Department of Plant Pathology, studying nematode parasitism genes and their effect on soybean plants.  Shortly after, he traveled to Dominica to fulfill his dream of becoming a doctor at Ross University School of Medicine.  Outside of the work, he enjoys outdoor activities including: motocross, hiking, tennis, climbing, camping, water sports and skiing.  He is also certified as a private pilot and in scuba,  As time permits, Casey is excited to take advantage of the new opportunities to explore Wyoming and the surrounding areas with his wife, Sara, and their dog Riley.

 North Stewart North, D.O.
Stewart was born and raised in southeast Idaho.  As a youth he was active in the Boy Scouts, marching band, swing dance club, and other activities.  Before college he spent two years in Italy as a missionary for his church.  He received his BA in biology from Idaho State University in 2009 and then attended West Virginia School of Osteopathic Medicine, graduating in 2013.  Stewart has a strong belief in the body's ability to heal itself and enjoys using osteopathic therapy techniques.  Stewart is married and they have an energetic little girl.  In his free time he enjoys hiking, reading, and playing with his family.  He is excited about the opportunity to live and work in Cheyenne.

Lyndle Shelby, M.D.
Lyndle is married with two sons.  He was born and raised on a farm in Oklahoma.  He returned to medicine after applying to medical school the first time in 1994.  In the interim years, his career was in the environmental field.  His experience was both industrial for Delta Faucet and agricultural as a business owner and environmental contractor in the Midwest.  He maintains an interest in environmental issues and sustainable agriculture.  He loves spending time with his wife and children doing outdoor activities such as gardening, swimming, hunting and fishing.  He comes to Cheyenne because of the residency's strong program and small town feel. It also puts his family closer to his wife's family in western Nebraska. 



Lenis Alvarado, M.D.

 Lenis was born and raised in Tao Alta, Puerto Rico.  She always knew she wanted to be a doctor ever since she was a little girl.  She attended Universidad De Puerto Rico where she graduated Magna Cum Laude and earned her Bachelors of Science in Biology and Anthropology.  While in undergrad, she traveled to China and Tibet with the International Scholar Laureate Program, there she toured Chinese and Tibetan hospitals.  She graduated with her M.D. from Poznan University of Medical Sciences in Poznan Poland, and hopes to work in a rural community as well as travel to areas that are in need of healthcare.  In her spare time she enjoys traveling, hiking, camping, dancing and music.


 Bryan Kaiser, M.D.

Bryan was born in North Dakota and moved to Northern California wine country as a teen.  He attended Sonoma State University where he majored in Biology with a Chemistry minor.  Upon completion of his Bachelors of Science degree he attended and graduated Western States Chiropractic, but after practicing for four years, he decided to return to medical school to fulfill his goal of becoming a medical doctor.  He attended medical school at Poznan University of Medical Sciences in Poznan, Poland.  Bryan hopes to practice in a rural area, as well as travel abroad to treat patients who have limited access to healthcare.   In his spare time he enjoys traveling and outdoor activities which include but are not limited to fishing, hunting, hiking, camping and water sports.


Bilal Khan, M.D.
Bilal grew up in Lawrenceville, GA, where he attended Georgia Perimeter College for his undergraduate studies.  He completed his Bachelor of Health Science degree and later received his Doctor of Medicine degree from Medical University of the Americas in Nevis.  His interests in Family Medicine include preventive medicine and patient education.  He was also actively involved with the underserved community in his hometown as a volunteer for which he received an Award of Excellence for Dedication to the Community.  Outside of medicine, he enjoys traveling, amateur photography and spending time with his wife, family and friends. Bilal is excited to be a part of the PCMH committee.


Evan Norby, D.O.
Evan grew up grew up near Daytona Beach, Florida where he loved to surf and play basketball.  As a child Evan aspired to be either an NBA star or a doctor.  After serving a year church mission in Lisbon, Portugal, Evan attended Brigham Young University.  At BYU he earned bachelor degrees in Nutritional Science and one in Exercise Science.  He then attended Midwestern University Arizona College of Osteopathic Medicine.  During medical school, he helped treat underserved persons in Antigua, Guatemala as part of an outreach program.  Evan has always been a proponent of preventive medicine through healthy lifestyle choices.  However not until training, did he realize the deleterious impacts of his sunbathing days and now plans to help others avoid the damaging effects of prolonged sun exposure.  When not practicing medicine he dabbles in the world of home theater and audio visual systems, plays sports, bowls with his wife, and loves having dance parties with his 2-year-old daughter. 


Tharenie Sivarajah, M.D.
Tharenie was born on the island of Sri-Lanka and immigrated to New York with her family in 1999 due to the civil war in her country.  She has witnessed a bloody civil war which has claimed thousands of innocent lives because there were not enough doctors.  Since that time her dream has been to practice medicine.  She graduated with Chemistry honors from City University of New York and earned her MD from American University of Antigua.  Tharenie still pursues her interest as a dancer and participates in stage shows with her twin sister (also a physician), where they perform a unique style of Bollywood dancing with a mix of Western hip-hop.  She also enjoys running, watching TV series, like "Game of Thrones" and cooking; especially desserts.  Tharenie is also excited to be a part of the PCMH committee.


Catherine Sundsmo, M.D.
Cathy was born and raised in San Diego, CA; where she grew up living an active lifestyle.  During her years at the University of Arizona, Cathy studied Psychology and Spanish and played soccer for the women's soccer team (Go Cats!)  After graduating, Cathy spent time in Tanzania as an HIV/AIDS educator and volunteering in Mexico, and these experiences solidified her desire to pursue medicine. She continued her passion for traveling, volunteering, and working with the underserved at Ross University where she earned her MD.  Cathy chose the University of Wyoming Family Medicine Residency Program at Cheyenne because if offers the best broad-spectrum training, the opportunity to do many procedures, good exposure to OB, outstanding faculty and residents, and the program feels like one big family.  Cathy enjoys Family Medicine because she likes building relationships and providing comprehensive care to a wide range of patients with diverse medical and social issues.  Cathy's interest outside of medicine include playing soccer, running, hiking, gardening and spending time with her husband, Andrew and their dog Mila.  While not at the hospital, Cathy is looking forward to exploring the great state of Wyoming, learning to fly fish, ride horses, mountain biking and take up winter sports.



Paul Denna, M.D.
Paul was raised in northern California, and after serving a two-year mission in Ireland for his church; enlisted in the US Army.   He was in Special Operations as a Ranger and later as a sniper in reconnaissance units.  During his eight-year enlistment, Paul almost lost his son to meningitis, and from that moment on decided to become a physician to help others.  After leaving the Army Paul earned his BS in biology at California State University, Sacramento.  He then earned his MD from Saba University School of Medicine.  During his clinical training, he gained excellent experience by doing clerkships at Yale University , University of Louisiana, University of Miami and University of Washington affiliated residency programs and hospitals.  He loves to spend time with his family and enjoys distance shooting, mixed martial arts, reading, history, power lifting and church activities.


Jennifer Pimentel Jahns, M.D.
Born in Califonia, Jenn spent most of her life in the Pacific Northwest.  Jenn attended Seattle University, where she earned her BS.  At Ross University she served as the Women's Health Coordinator, was an indoor cycling instructor, Webmaster/Newsletter editor and choir director for the Catholic Student Association.  She was a member of a volunteer group for clean-up efforts after hurricane Katrina.  Jennifer's husband is an organic farmer.  Any outdoor activities, such as hiking, gardenting, bike riding, and fly-fishing are things Jenn enjoys in her free time.  She also enjoys reading fictional perieod novels, and most recently has discovered an interest in reading accounts of the early American experience.


Afzal Khan, M.D.
Afzal completed his undergraduate education at Arizona State University, and his MBA from Davenport University in Grand Rapids, MI.  He has been described as hard working, well motivated and responsible with good leadership qualities.  His desire to serve those most in need is evidenced by his volunteerism with the under privileged.  Spending time with family and friends, basketball, football, running and travel are Afzal's interests outside of medicine.


Tammy Koop, M. D.
Tammy received her BA from Northwest University, Kirkland, WA and initially pursued a career in business.  She applied to medical school when she decided that she wanted something different-something challenging and meaningful.  Continuity of care, including medical missions is what drew her to Family Medicine.  Outside of medicine Tammy plays tennis, golf, and enjoys outdoor recreation and is a beginner pianist.  Owning a FKC vitamin store keeps her involved in the business world.  Tammy is looking forward to her wedding in September.




Thanh-Thao Le, M.D.
TT was born in Saigon, Viet Nam, and immigrated from Vietnam with her family as a teen.  Overcoming language and cultural barriers, her family settled in Houston, TX.  She attended Davenport University in Grand Rapids, MI where she received both her BS and MBA.  TT serves as a Vietnamese interpreter for Language Line Services, which is an international company that translates for 911 emergency calls, hospital and doctor's offices, insurance companies, Medicaid and Medicare services, the police department and banks. Family is an important part of her life, but she also like spending spare time with her husband, reading mysteries and writing, watching medical dramas and documentaries, listenting to music, traveling and learning about cultures.  She is learning new cuisines and perfecting her Vietnamese cooking.

2013 Graduates


 Nima Azarbehi, D.O.
Nima attended Southern Oregon University for his undergraduate degree, before enrolling at Touro University College of Osteopathic Medicine.  He has worked as a professional ski patroller in Colorado, California and Oregon.  He has many sports interest, including skiing, soccer, volleyball, cycling and rafting.  Nima also enjoys piano, guitar and road trips.  Nima was the Soccer Club president at Touro.  While in medical school he served as the on-campus Kaplan representative, and was a member of a group of assistants researching the use of osteopathic manipulative treatments to improve patient lung functions.  Nima is also enjoyed serving on the PCMH committee.  Nima has moved back to Oregon to practice full-spectrum Family Medicine.


 Jeffrey "Jake" Behringer, M.D.
Jake earned his undergraduate degree from the University of North Carolina with a degree in Geology, but feeling the urge to provide relief to the less fortunate, he joined the Peace Corps, which in turn led to his path to medical school.  He received his MD degree from Ross University School of Medicine.  Jake participated in the couple's match with his wife Kristina.  Being active is an important component in his life and he loves to build and restore furniture and surfboards.  He enjoys being outdoors doing almost anything, especially surfing, camping and cycling.  He feels lucky to have a family that enjoys being active with him.  His other interests includes music (playing guitar and saxophone.)  Jake has joined a Family Medicine group in Cheyenne, and will be practicing with his wife Kristina.


Kristina Behringer, M.D.
Kristina's undergraduate degree was completed at the University of Colorado and she earned her medical degree from Ross University School of Medicine.  While at Ross Kristina was a member of the Wilderness Medical Society.  Kristina was part of a couples match with Jake Behringer.  With their children they enjoy hiking with their dogs, and she and her daughter share the love of horses.  Kristina's hobbies include horses:  jumping, training, trail riding, jewelery making, furniture upholstering, sewing and knitting.  Kristina has joined a Family Medicine group in Cheyenne. 


Derek Nevins, M.D.
Derek, a native of Wyoming attended the University of Wyoming, where he received a BS degree in Zoology and Physiology.  As a WWAMI medical student he attended the University of Washington where he received his medical degree and completed one year of residency at the University of Washington Department of Surgery.  In going forward with his medical career, Derek joined the University of Wyoming Family Medicine Residency Program at Cheyenne.  When time permits Derek enjoys sports of all kind, including:  golf, tennis basketball and football.  He also enjoys spending time with his wife, baby boy and traveling.  Derek is working at an urgent care clinic in Cheyenne.


Robert Oravec, M.D.
Originally from Illinois, Robert earned a BS degree from Benedictine University in Lisle, IL and his MD from Ross University School of Medicine.  Prior to medical school Robert's career included varied business experiences.  He started his career as an engineer, and became the owner of a manufacturing company, providing metal fabrication services as well as complete building maintenance services.  He was also Vice President of a nursing education company.  He developed a fascination with the medical arts at an early age, and was further inspired by his extensive volunteer work in hospitals and medically underserved communities.  He enjoys outdoor sports, especially mountain biking, hiking and camping.  Robert also likes foreign travel and gardening.  Robert will be practicing in Cheyenne.


Yusuf Ruhullah, M.D.
Although Yusuf attended high school in the U.S. he opted to attend medical school in India and received his medical degree from Kamineni Institute of Medical Sciences.  He enjoys swimming, hiking, camping, hunting and bush craft, reading classic and contemporary American literature, watching wild-life and science documentaries, theoretical physics and electroplating.  He is impressed with Family Medicine because he feels that it requires detailed knowledge of all specialties to be efficientYusuf will be practicing Family Medicine in California.


Aaron Wilson, M.D.
Aaron, a native of Indiana, completed his undergraduate studies at Southern Adventist University, Collegedale, TN.  He earned his MD from the American University of the Caribbean.  In his spare time, Aaron enjoys all kinds of team sports, hiking, SCUBA, golf, snow skiing, traveling, cars, computers, learning Spanish, learning history, some movies and fixing things.  He has traveled extensively throughout the world, doing both missionary work and while doing his clinical training during medical school.  Aaron and his family have moved to rural Nebraska and has joined a Family Medicine group.

Share This Page:

Footer Navigation

University of Wyoming
1000 E. University Ave. Laramie, WY 82071 // UW Operators (307) 766-1121 // Contact Us