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Physician

Eric Lyall, MD .

  • Board-Certified Emergency Medicine
  • Founder, Peak Personalized Healthcare

Built this practice after years in emergency medicine showed him how reactive care fails the people who need it most — including the version of himself he was becoming.

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Watch Intro
His Story

The pivot.

Years in emergency medicine taught Dr. Lyall something the data already showed: the patients arriving in his ER weren’t there because of accidents or acute illness. They were arriving with the end-stage consequences of metabolic disease, decades in the making.
By his mid-30s, the pattern was personal. The same fatigue, metabolic dysfunction, and declining fitness he’d been seeing in patients had caught up with him — driven by shift work and the lifestyle costs of emergency medicine. The realization that prompted Peak: the conventional system is built to manage diseases after they appear, not to prevent them in the first place.
Peak exists to do the opposite. Measure what’s actually happening inside a body before it becomes a diagnosis. Build a structured plan to keep it from ever getting there. Adjust the plan as the data evolves.

Training

Where he trained.

Fifteen-plus years in clinical medicine. Board certification in emergency medicine. Continuing focus on the science of healthspan and longevity.

  • Undergraduate

B.S., Biological Sciences — University of Georgia

  • Medical Degree
M.D. — Medical College of Georgia
  • Residency
Emergency Medicine — University of Wisconsin
  • Board Certification
Emergency Medicine
Approach

Measure first. Prescribe second.

The three-step method Peak uses with every patient is the one Dr. Lyall follows personally: measure objectively, interpret in clinical context, and act with continuous adjustment.
At Peak, Dr. Lyall sees every patient personally — not just at intake, but through every interpretation, every plan adjustment, every follow-up. No rotating providers. No mid-levels managing protocols. The relationship is the practice.
Outside the Clinic

An Idaho life, by choice.

Originally from Suwanee, Georgia. He met his wife Alexis in medical school and moved the family to Boise after residency. They now have grown their family with 3 wonderful daughters: Sutton, Georgia, and Hattie

When he’s not at the practice, he’s on the trail, on the water, or on the slopes — biking, hiking, skiing, camping, rafting, hunting, fishing. The outdoors is why the family landed here.

The Team

Three colleagues. One standard of care.

Dr. Lyall leads every patient relationship, but he doesn’t do it alone. The team is small, intentional, and built around the disciplines that matter most for longevity care.

BR

Beverly Reininger

RN, NC-PN1

Nutrition and Lifestyle Lead

Registered nurse and certified nutrition coach. Boise State University nursing graduate, 2005. Coordinates patient nutrition and lifestyle protocols, with a focus on how small structural changes compound over time.

RG

Roxy Gambrel

RN

Functional Care Nurse

Eight-plus years in emergency medicine before transitioning to functional and preventative care. College of Southern Idaho graduate. Focuses on root-cause patient education and follow-up between physician visits.

RF

Sean Wagnon

B.S excercise science The college of idaho

Masters: sports conditioning and performance. Southern Utah University

Sean is a previous collegiate runner and worked for years in performance optimization, physical therapy, and personal training
Begin

Meet with Dr. Lyall.

Every Peak relationship begins with a complimentary consultation. We review your goals, walk through the approach, and determine fit. No commitment, no prep, no pressure.
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Call 208-683-7325