· Guide · 2 min read
Welcome to Onix: McCall McPherson
Physician associate, TEDx speaker, and founder of Modern Thyroid Clinic. McCall is on a mission to fix thyroid care.
We are thrilled to welcome McCall McPherson to Onix.
McCall McPherson, PA-C has built her career at the intersection of medicine and mission. As a physician associate, entrepreneur, and founder of Modern Thyroid Clinic, she has spent over a decade pioneering a smarter, more nuanced approach to thyroid, hormone, and metabolic health, one that actually gets patients well.
Her expertise is personal. In her twenties, undiagnosed hypothyroidism left her nearly non-functional, exhausted, dismissed, and told her labs were “normal.” That experience did not just change her health. It changed her entire understanding of what good thyroid care has to look like. Once she found her own answers, she built a clinic around making sure others could too.
Today McCall is a TEDx speaker, host of the Modern Thyroid & Wellness podcast, a 2025 Top 500 Inc. Female Founder, and founder of one of the Top 150 Fastest Growing Health Companies in the country.
Thyroid and hormonal health is one of the most misunderstood and dismissed areas in medicine, and millions of people are suffering with symptoms they’ve been told are normal or in their heads. Onix lets me meet people in the private, personalized space this kind of care actually requires.
— McCall McPherson, PA-C
What Her Guide Does on Onix
Help people finally get real answers on thyroid and hormonal health, cutting through years of dismissed symptoms, misread labs, and one-size-fits-all prescriptions. Grounded in functional medicine, rooted in lived experience, and relentlessly focused on one thing: getting your life back.
