A few words

About our clinic

When visiting Machen Family Medicine in Idaho Falls, residents will recognize their emphasis on prevention and maintenance of chronic conditions before the disease has progressed significantly. Prevention includes weight management, increased physical activity, regular screenings or blood tests, and adhering to recommended vaccination schedules.

Idaho Falls physicians increasingly place emphasis on preventing the development of health conditions and noting early indications of disease, instead of focusing on treatment aspects such as medication. Individuals searching for a local Idaho Falls family doctor to provide annual physical exams in addition to sick visits will be more than happy with Dr. Machen’s dedication and determination, and his extensive office policy regarding urgent care.

Meet our medical professionals


Shane G. Machen, D.O.

Who would ever have believed that a bull riding, potato farming fisherman from Idaho would become a successful bi-lingual Doctor of Osteopathic Medicine and establish a practice in Idaho Falls, fast becoming a favorite with his patients, young and old? It’s true. Dr. Shane G. Machen, D.O. is simply a boy from Roberts who has taken a desire to serve, backed it with a quality education, moved to Idaho Falls, and created a compassionate and successful family practice that, as a Doctor of Osteopathy, goes well beyond that of an M.D. He has an exemplary bedside manner, putting the need of his patients first and foremost, and continuously strives to provide them with the best available quality of care by keeping abreast of the rapidly evolving advancements in medicine.

As a young man, he found that feeding cattle in-20° weather, training horses, wrestling, bull-riding, fighting wildfires for the BLM, and taking two years off to serve a mission in Chile has provided him with a respect for hard work and dedication, as well as a need to share his talents and abilities, as he did in 2008 when he participated in a traveling doctor’s program in Guatemala.

Dr. Machen received his Associate of Science at Brigham Young University; his Bachelor of Science at Idaho State University; his Doctor of Osteopathic Medicine at Kansas City University of Medicine and Biosciences in Kansas City, Missouri; and trained in Family Medicine at the Research Medical Center in Kansas City, Missouri as well.

Dr. Machen was drawn to establishing a family clinic because of one important lesson he learned during his residency…Family medicine doctors were some of the happiest physicians he knew on rotations. And, above all, he wants to be happy, become an integral part of the community, and make a difference in the lives he touches.

He takes pride in being able to provide urgent care for his patients, thus saving them sometimes hundreds of dollars over a trip to an emergency room. He’s also great with kids and considers his pediatric services to be one of the most rewarding aspects of his practice. With his training in internal medicine he can effectively diagnose and treat a variety of illnesses, diseases, and infections. Musculoskeletal issues such as pinched nerves, spinal misalignment, and carpal tunnel, as well as neurological issues can also be effectively addressed through the scope of the Osteopathic family physician.

Dr. Machen is a family man. Married over 15 years to Esther, whom he met when they were both attending Rick’s College (BYU-I), they now have four beautiful children, two boys (Stetson and Austin) and two girls (Cheyenne and Bonnie), and Esther is a dentist and has her own practice, also here in Idaho Falls.

So now you know a little more about this Idaho boy. And the icing on the cake is he’s personable, he’s dedicated, and a caring family physician.


Kristi Grigg, PA-C

Kristi has practiced for over 15 years as a certified physician assistant in East Idaho, in family practice and urgent care. She graduated as a physician assistant from Southern Illinois University-Carbondale in 2003. Kristi completed her undergraduate degrees in biology from Utah State University and Ricks College, where she graduated summa cum laude and received the distinction of being a Spori Scholar.

Kristi was inspired to become a physician assistant when she witnessed the loving care given to her grandmother by hospice. She knew that she wanted to give to others that compassion and care, and to help people of all ages. Kristi enjoys all areas of family practice and would love to participate in the care of your family.

Kristi grew up in Colorado and moved to Rexburg, Idaho as a teen. She loves being in Idaho where she can enjoy the outdoor activities available in this beautiful state, such as skiing, hiking, and camping. She also loves traveling and seeing places she hasn’t been before. Most of all, Kristi enjoys spending time with her husband and their three children.


Andrea Gardner, PA-C

Andrea Gardner is a board-certified physician assistant who graduated from the University of Utah in 2016 with a Master of Science in Physician Assistant Studies. She completed her undergraduate degrees in Nursing and Exercise Science at Brigham Young University-Idaho in 2009. 

Andrea was working in a family practice and urgent care clinic in Salt Lake prior to her recent move to Idaho Falls. Born and raised in Firth, she is excited to return to Idaho to live, work, and raise her family. She is thrilled to be joining the team at Machen Family Medicine.

Andrea enjoys all aspects of family and preventative medicine, and especially loves well woman exams, contraception management, and pediatric visits. She has found diabetic and other chronic disease management an enjoyable and rewarding experience as well. Andrea finds the most satisfaction in helping her patients achieve their optimal physical, mental, and emotional health and loves it when she can develop meaningful relationships with multiple members of a family-from grandma on down to the newest addition!

When not working Andrea is busy being a mother to two beautiful boys, Luke and James, and a wife to her wonderful husband, Sam. She loves spending time in the outdoors with her family and likes hiking, biking, camping, boating, and gardening. She loves reading, quilting, playing games, and skiing to get through the winter.

Why choose us?

Dr. Shane Machen is a general family practitioner and experienced Idaho Falls physician, trained in providing preventative care for his patients as well as emergency visits. Patients of Machen Family Medicine in Idaho Falls, ID, benefit from the comprehensive knowledge and skills that Dr. Machen utilizes to competently care for patients in all age groups. Families are able to receive care for each member of a family, instead of visiting a pediatrician for their children and independent adult medicine physicians in Idaho Falls for their own appropriate care. This centralized service allows patients to forge a strong patient/physician connection and receive care from one Idaho Falls family doctor, Dr. Shane Machen.

As a professional who is educated and trained to practice family medicine with Idaho Falls residents, Dr. Machen implements an approach that seeks to help patients maximize physical and mental well-being. A primary goal for Machen Family Medicine in Idaho Falls is to prevent malaise and disease from developing in their patients through regular physical examinations and health guidance. Being one of the best local family clinics in Idaho Falls, Machen Family Medicine is prepared to treat all types of patients, from newborns to the elderly, for a wide range of medical needs. Individuals searching for a family clinic in Idaho Falls to schedule their annual physical examination, vaccinations, well-child exams, and biopsies will find services to satisfy their requirements.