About InSpero Medical

Our mission is to empower people through science, love, and collaborative engagement to create the highest expression of themselves and humanity.

Mission & Philosophy

At InSpero Medical, we believe that every individual has the opportunity to optimize their health – both physically and mentally. There is always hope for greater resiliency, an increase in healthspan, more freedom in the physical body, and an abundance of happiness. We aim to provide access to safe, effective, and evidence-informed medicine and to build a unique partnership with each patient founded in compassion, innovation, and education to help them achieve their personal health goals.

InSpero comes from the Latin words “inspirare” and “spero” which means “to breathe into” and “hope.”

Our Team

Dr. Susan Lan

Dr. Susan Lan, DO, MPH, MS, IFMCP is a traditionally trained osteopathic physician specializing in preventive medicine, public health, and functional medicine. She has been in practice now for over 20 years and has experience in emergency medicine, family practice, military medicine, and medical directorship.

Dr. Leslie Yedor

Dr. Leslie Yedor, DAOM, L.Ac., IFMCP is an integrative medicine specialist and is trained in functional
medicine, western allopathic medicine, and traditional Chinese medicine. She holds Doctorate in Acupuncture and Oriental Medicine and is a Licensed Acupuncturist and board-certified herbalist.

Kirsten Wechsler

Kirsten Wechsler is originally from Southern California, but has called the Vail Valley home for twenty-five years. Bringing decades of successful marketing and project management experience, she has been a vital member of every team she’s been a part of including a senior executive for a large, national marketing firm.

The InSpero Family

We have an amazing team of nurses and patient care technicians who assist with blood draws, IV infusions, detox, and other elements of patient care. With a wide variety of backgrounds ranging from emergency medicine to wilderness medicine, these men and women bring a wealth of experience and compassionate care to InSpero.
Erin Gross – Patient Care Coordinator

Erin GrossClinic Director

Sarah Pfeiffer

Sarah PfeifferPhysican Assistant

Nicky Bunn – Patient Care Technician

Nicky BunnPatient Care Technician


Dr. Lan has been helping me with my thyroid issues for three years now and I couldn’t be more grateful for her compassionate care and insightful medical advice. Her inclusive testing has helped me understand what my body needs and how best to provide it through dietary changes and supplements. Despite previously having half my thyroid removed, I’ve been able to get off medication and today am living the active lifestyle I love. I recommend Dr. Lan and her supportive team to everyone I know. Thank you!


Dr. Leslie has such broad knowledge. I had been to chiropractors, physical therapists, orthopedists, and physiotherapists and nobody was able to make an impact on my improvement. In one session Dr. Leslie made more of a difference to my recovery than all the other specialists combined! She really saved my summer of climbing. All of my friends in Yosemite Valley agree; she is an amazingly insightful, caring and competent doctor. I cannot recommend her more highly!


Dr. Lan's approach — finding and eliminating the cause of my illness, rather than just treating its symptoms — made sense to me when she explained it at our first appointment. She really took time to get to know me, and to understand what I wanted from my medical care. After completing a series of tests and following Dr. Lan’s recommendations, I’ve seen a dramatic reduction in my symptoms and I am far less dependent on prescription medication. It’s an approach I would recommend to anyone facing a serious disease like my colitis.​​


Dr. Yedor makes it better! A week ago, I was limping around with a nasty swollen ankle. Yesterday, Dr. Leslie gave me an acupuncture treatment along with educating me on what’s going on with my leg and what I can do long-term to help fix the issue. Today, I’m feeling pretty good! Thanks Dr. Leslie for the great work you do!​