About
Dr. Mark Holthouse serves as Chief Medical Officer at Functional Medicine of Idaho, bringing board certifications in both Family Medicine and Integrative Medicine. He also holds the Certified Functional Medicine Practitioner designation, the IFMCP credential. He trained at Loma Linda University School of Medicine, completed his residency at David Grant Medical Center, and pursued additional training at the University of California Davis Health.
Dr. Holthouse focuses clinically on cardiometabolic health, hormone optimization, insulin resistance, pre-diabetes, type 2 diabetes, and fatty liver disease. He is passionate about proactive, patient-centered care that targets the root drivers of disease. He sees patients at the Eagle Clinic and via telemedicine in California, Idaho, Nevada, and Oregon.
Education & Training
Medical School
Loma Linda University School of Medicine
Residency
David Grant Medical Center
Additional Training
University of California Davis Health
Certifications
Conditions Treated
Who is Dr. Holthouse right for?
Dr. Holthouse is a strong fit for adults managing cardiometabolic conditions like insulin resistance, pre-diabetes, type 2 diabetes, or fatty liver disease. Patients seeking hormone optimization or age-reversal protocols benefit from his precision-focused approach. He works well with those who want a proactive plan targeting root causes rather than symptom management. Patients in California, Idaho, Nevada, and Oregon can also access his care via telemedicine.
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Family MedicineFrequently Asked Questions
Dr. Holthouse focuses on cardiometabolic health, hormone imbalance, insulin resistance, pre-diabetes, type 2 diabetes, fatty liver disease, and cardiovascular disease. He takes a root-cause approach to each of these conditions. His goal is to build personalized protocols that promote lasting metabolic and hormonal health.
Yes. Dr. Holthouse holds board certifications in both Family Medicine and Integrative Medicine. He also carries the Certified Functional Medicine Practitioner credential, the IFMCP designation, which reflects advanced training in functional medicine methodology.
Dr. Holthouse earned his medical degree from Loma Linda University School of Medicine. He completed his residency at David Grant Medical Center and pursued additional training at the University of California Davis Health.
Dr. Holthouse sees patients at the Eagle Clinic location. He also offers telemedicine visits for patients in California, Idaho, Nevada, and Oregon.
Dr. Holthouse takes a proactive, patient-centered approach that prioritizes prevention and root-cause resolution. He focuses on addressing the underlying drivers of metabolic and hormonal dysfunction rather than managing symptoms with medication alone. He builds individualized plans aimed at lasting wellness.
Yes. Hormone optimization is one of Dr. Holthouse's primary clinical interests. He works with patients on hormone imbalance and age-reversal protocols, using advanced diagnostics to guide personalized treatment plans.
Yes. Dr. Holthouse has appeared on the Functional Medicine Foundations Podcast to discuss lean mass hyper responders, the KETO-CTA trial, and the implications of low-carb diets for cardiometabolic health. His insights draw directly from his clinical focus and training.
Doctor profile last updated June 11, 2026