
TRAINING, MEMBERSHIPS & AFFILIATIONS
- American Academy of Physician Assistants
Member - National Commission on Certification of Physician Assistants
Board-Certified - Florida Academy of Physician Assistants
Member - The University of South Carolina
Alum - NOVA Southeastern University-Jacksonville
Masters in Medical Science in Physician Assistant Studies
Mary Katherine Charles, PA-C
NEW MEMBER LIAISON | BOARD-CERTIFIED PHYSICIAN ASSISTANT
“Every time the phone rings or someone walks in the door, I want to connect with them. I try to know all of our members—their kids’ names, their spouses’ names, and really who they are.”
As our New Member Liaison, Mary Katherine Charles is often the first team member that prospective members encounter at Griffin Concierge Medical.
She began as a student with Dr. Griffin in 2013 and says that she immediately knew GCM was where she was meant to be. She served as a Physician Assistant and Clinical Operations Manager before transitioning to the New Member Liaison role, which allows her to exclusively connect with prospective new members and educate them on GCM’s model of care.
“I want to help people, whether that means helping them to better understand a complex medical issue or educating them on the many ways we can advocate for them,” says Mary Katherine. “I am thrilled to be working with a team of professionals who share this commitment to patient care and true collaboration.”
Born and raised in Virginia, Mary Katherine says that a piece of her heart will always remain in the mountains of Southwest Virginia. Her husband is from South Tampa. When she is not in in the office, she enjoy exercising, traveling and spending time with family, friends and her dogs.

Mary Katherine Charles, PA-C
NEW MEMBER LIAISON | BOARD-CERTIFIED PHYSICIAN ASSISTANT
“Every time the phone rings or someone walks in the door, I want to connect with them. I try to know all of our members—their kids’ names, their spouses’ names, and really who they are.”
As our New Member Liaison, Mary Katherine Charles is often the first team member that prospective members encounter at Griffin Concierge Medical.
She began as a student with Dr. Griffin in 2013 and says that she immediately knew GCM was where she was meant to be. She served as a Physician Assistant and Clinical Operations Manager before transitioning to the New Member Liaison role, which allows her to exclusively connect with prospective new members and educate them on GCM’s model of care.
“I want to help people, whether that means helping them to better understand a complex medical issue or educating them on the many ways we can advocate for them,” says Mary Katherine. “I am thrilled to be working with a team of professionals who share this commitment to patient care and true collaboration.”
Born and raised in Virginia, Mary Katherine says that a piece of her heart will always remain in the mountains of Southwest Virginia. Her husband is from South Tampa. When she is not in in the office, she enjoy exercising, traveling and spending time with family, friends and her dogs.
TRAINING, MEMBERSHIPS & AFFILIATIONS
- American Academy of Physician Assistants
Member - National Commission on Certification of Physician Assistants
Board-Certified - Florida Academy of Physician Assistants
Member - Tampa General Hospital
Affiliated, holds hospital privileges - St. Joseph’s Hospital
Affiliated, holds hospital privileges - Memorial Hospital of Tampa
Affiliated, holds hospital privileges - The University of South Carolina
Alum - NOVA Southeastern University-Jacksonville
Masters in Medical Science in Physician Assistant Studies
Radley Griffin, M.D.
Board-Certified Family Physician
Founder, Griffin Concierge Medical
Debbie St. Clair
Board-Certified Family Physician
Medical Director, Griffin Concierge Medical