InterMountain Medical Clinic Providers & Physicians

Dr thayne family medicine


InterMountain Medical Clinic offers many choices of professionals whom can provide your medical care. These professional providers are physicians, nurse practitioners, physician assistants, and pharmacists. These physicians come together as a team to provide you with complete and quality medical care.

The Family Physicians:

All of the physicians at InterMountain Medical Clinic are Board Certified in their respective specialty. Board Certification indicates a higher standard of education with continual medical education to remain current with the latest medical care.  Our physicians have active staff privileges at Portneuf Medical Center.

Kris Walker, M.D.

Dr. Walker completed her undergraduate studies at Idaho State University in 1983 and earned her Medical Doctorate from the University of Nevada School of Medicine in 1994. She completed her three year Family Practice residency at McKay Dee Hospital and became Board Certified in Family Practice in 1997. She joined InterMountain Medical Clinic in 1997. She has a special interest in pediatrics and additional training in Advanced Cardiac Life Support. Dr. Walker is an affiliate faculty member at Idaho State University and the University of Washington. Her interests are family, bicycling and skiing. Dr. Walker is currently accepting new qualified patients.

Andy Thayne, M.D.

Dr. Thayne completed his undergraduate studies at Brigham Young University in 1990. He then attended the Uniformed Services University School of Medicine in Bethesda, Maryland while on an Army scholarship, graduating in 1994. He did his three year Family Practice Residency at Madigan Army Medical Center, Fort Lewis, Washington, finishing in 1997. He was then a staff physician for four years at Irwin Army Community Hospital, Fort Riley, Kansas. He ended his active-duty time back at Madigan for three years on teaching staff in the Family Practice residency program. He joined InterMountain Medical Clinic in 2004. Dr. Thayne enjoys full-spectrum family medicine including procedures and medical education. He enjoys time with his wife, a Pocatello native, and their six daughters. He also enjoys athletics, outdoor activities, and interacting with the wonderful people of Pocatello and the surrounding communities. Dr. Thayne is currently accepting new qualified patients.

Brandon Mickelsen, D.O.

Dr. Brandon Mickelsen grew up in Pocatello and attended Highland High School. After completing an LDS mission in Holland and Belgium he attended Idaho State University, receiving his bachelor’s degree in Biology. During his time at ISU, he was the junior varsity girls basketball coach at Highland High School. He received his Medical Degree in 2006 from The University of New England College of Osteopathic Medicine. His residency and internship training were here in Pocatello where he served for one year as a chief resident. During residency, Dr. Mickelsen sat on the Board of the Idaho Medical Association as the state resident representative. He is currently serving as the president of the Southeast Idaho Medical Association. During residency, Dr. Mickelsen was active in the community, giving medical help at local high school and university sporting events. He also participated in medical coverage of several intermural boxing events on campus, as well as coverage of area high school football games. He has a special interest in non-narcotic management of chronic pain, preventative medicine, diabetes, and obstetrics. He has been accompanied in his educational pursuits by his wife Jenafer and their five children: Mason, Megan, Benson, Bella and Kylee. He enjoys basketball, hiking, camping, snow-skiing, snow-shoeing, and most of all spending time with his family. Dr. Mickelsen is currently accepting new patients.

Travis Nielsen, D.O.

Dr. Nielsen grew up in Downey and completed an LDS mission in Spain. He graduated from Idaho State University with honors with a bachelor in Zoology. While at ISU, he received a research grant in genetics. He attended medical school at Midwestern University Arizona College of Osteopathic Medicine in the Phoenix area. There he led the family medicine student chapter, spent time at the Mayo Clinic, and was in the top five in his class. He then returned to ISU where he completed a residency in family medicine. He received additional training there in hospital medicine, cardiology, and women’s health. He also helped with the ISU Athletics Department. He has a special interest in cardiac stress tests and non-obstetrical women’s health. He is also fluent in Spanish. He enjoys spending time with his wife, Melanie, and three young daughters and a son. He has fun hiking, riding ATVs and snowmobiles, and spending time working on his yard. Dr. Nielsen is currently accepting new patients.

Blaine Olsen, D.O.

Dr. Olsen graduated from ISU Family Medicine Residency in 2012 and has been practicing with InterMountain Medical Clinic since then. He enjoys the broad scope of family medicine including delivering babies. He attended medical school at Midwestern University Arizona College of Osteopathic Medicine in the Phoenix area. He served a two-year mission for his church in Cincinnati, Ohio. He enjoys camping, traveling, running, woodworking and backpacking. Dr. Olsen is currently accepting new patients.

Zachary Warnock, M.D.

Practicing family medicine is very rewarding to Dr. Warnock because of the opportunity to help his patients and all their family members over the course of their lifetime. He enjoys the variety of care he can provide as a family physician. After medical school in Albany, New York he completed residency at the Idaho State University Family Medicine Residency. Dr. Warnock and his wife are the proud parents of three daughters and enjoy spending time together camping, hiking, and other outdoor activities. Dr. Warnock is currently accepting new patients.

Sharla Clark, D.O.

Dr. Sharla Clark grew up in Utah and completed her undergraduate degree in Biology at BYU in 2008. She received her Doctor of Osteopathic Medicine degree from Touro University Nevada in Henderson, Nevada in 2012. Dr. Clark completed her residency here in Pocatello at ISU Family Medicine Residency where she served as chief resident for 1 year. Dr. Clark has strong ties here given that her husband grew up in Pocatello. Dr. Clark enjoys full spectrum family medicine and has a special interest in obstetrics, women’s health, and pediatrics. She performs multiple procedures as well. Dr. Clark enjoys spending time with her husband, Chad, and her young daughter, Pyper. She enjoys sports especially tennis, biking, hiking, and camping. Dr. Clark is accepting new patients.

Bill Sabel, F.N.P.

Nurse Practitioner

Bill joined InterMountain Medical Clinic in April 2005. Bill comes from a cardiology setting with experience in coronary artery disease risk reduction, congestive heart failure treatment and heart rhythm problems. Before earning his Nurse Practitioner credentials, Bill worked as an RN in occupational health for the JR Simplot Company and in the Emergency Department at Bannock Regional Medical Center. Bill also serves as Adjunct Faculty for the Department of Nursing at Idaho State University. Bill moved to Inkom, Idaho at the age of nine from Fond du Lac, Wisconsin. He graduated from Marsh Valley High School. After graduation, Bill moved to Pocatello and earned his Bachelor of Science Degree as a Registered Nurse from ISU in 1991. Bill received his Master’s of Science Degree as a Family Nurse Practitioner from ISU in 2002. He is Nationally Certified as a Family Nurse Practitioner with the American Academy of Nurse Practitioners, and is licensed to practice with the Idaho Board of Nursing. In his spare time, Bill enjoys spending time with his wife and four kids in the Idaho outdoors. He is currently accepting new qualified patients.

Nicolette Hampton, F.N.P

Nurse Practitioner

Nicolette was born and raised in Pocatello and although she moved to other places, she has always felt a strong tie to her home town. Nothing brings her greater joy than helping others whether it be family, friends or patients. Nicolette graduated with honors from Walden University receiving her master’s degree in nursing in August of 2015. Her passion is in family health and development which is why she dedicated her degree in being a Family Nurse Practitioner. Nicolette joined IMMC six years ago as a nurse for Dr. Mickelsen and has joined his practice as an FNP in May of 2016. She enjoys many activities like golfing, boating, camping and especially running and physical fitness. She enjoys life with her husband Jason and her two boys Kanon and Krew. Nicolette has always been a strong advocate for health and fitness and strives to be a strong role model for others and she loves nothing more than for others to join her in the pursuit of health and happiness. She is currently accepting new patients.

Cara Liday, PharmD, CDE, BCPS


Dr. Liday is an Associate Professor at Idaho State University College of Pharmacy. She earned her Pharm.D. degree at ISU and completed a pharmacy practice residency and fellowship with the Department of Family Medicine. She has been a member of the ISU faculty since 1998. Dr. Liday is an Ambulatory Care clinical pharmacist with InterMountain Medical Clinic in Pocatello. She is a Certified Diabetes Educator and provides clinical services to the clinic in diabetes management, continuous glucose monitoring, insulin pump therapy, anticoagulation, and polypharmacy issues. She is currently accepting new qualified patients.