We found 2 fonts on https://mayoclinic.com

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h2
a
div
span
h1
h3
11 Styles

Mayo Clinic Serif

Designed by Type Director Neville Brody, Type Designers Luke Prowse & Florian Runge, Brody Associates
span
div
h2
p
a
14 Styles

Mayo Clinic Sans

Designed by Type Director Neville Brody, Type Designers Luke Prowse & Florian Runge, Brody Associates

FontofWeb by Simdi Jinkins & Onyemsobi