Our Team

Our Team

Catherine C. Grant

Founder/CEO

Catherine is Chief Executive Officer of ExperCARE, a company she co-founded as The Urgent Care Center of Richmond Hill in 2009. An honors graduate of The Medical University of South Carolina with a Master of Science in Physician Assistant Studies, Catherine has more than 14 years of experience in not only urgent care and occupational medicine, but also orthopedics, plastic and reconstructive surgery, and also physical medicine and rehabilitation.

Catherine C. Grant

Founder/CEO

Catherine is Chief Executive Officer of ExperCARE, a company she co-founded as The Urgent Care Center of Richmond Hill in 2009. An honors graduate of The Medical University of South Carolina with a Master of Science in Physician Assistant Studies, Catherine has more than 14 years of experience.

Founder/CEO

Catherine C. Grant

Catherine is Chief Executive Officer of ExperCARE, a company she co-founded as The Urgent Care Center of Richmond Hill in 2009. An honors graduate of The Medical University of South Carolina with a Master of Science in Physician Assistant Studies, Catherine has more than 14 years of experience in not only urgent care and occupational medicine, but also orthopedics, plastic and reconstructive surgery, and also physical medicine and rehabilitation.

Robert A. Mazur, MD

“As a physician who treats both ER and urgent-care cases, I know that the most important thing is having access to the care you need, as quickly as possible and I’m so glad that ExperCARE is able to meet that need while exceeding customer expectations in both Savannah and Richmond Hill.”

Medical Director

Medical Director

Robert A. Mazur, MD

“As a physician who treats both ER and urgent-care cases, I know that the most important thing is having access to the care you need, as quickly as possible and I’m so glad that ExperCARE is able to meet that need while exceeding customer expectations in both Savannah and Richmond Hill.”

J. David Carson, MD

“In 1879, my great-grandfather, John A. G. Carson, started Carson Naval Stores, a turpentine manufacturing business in Savannah; my father was born and raised in Savannah; I was born in Savannah, grew up here, and I’ve raised my family here,” stated Dr. Carson. “Savannah is home to me and always will be.”

Director of Occupational Medicine

Director of Occupational Medicine

J. David Carson, MD

“In 1879, my great-grandfather, John A. G. Carson, started Carson Naval Stores, a turpentine manufacturing business in Savannah; my father was born and raised in Savannah; I was born in Savannah, grew up here, and I’ve raised my family here,” stated Dr. Carson. “Savannah is home to me and always will be.”

Kari A. Smith

Director of Business Administration

Kari is a solution minded, experienced leader who holds a B.S. in Health and Wellness from the University of New York at Buffalo, NY. Her diverse background in business administration includes fine art studio management, digital art sales, and fundraising for Hunter’s Hope Foundation, a nonprofit dedicated to raising awareness and research funding for Leukodystrophy, a rare genetic disease that is currently without a cure.

Director of Business Administration

Kari A. Smith

Kari is a solution minded, experienced leader who holds a B.S. in Health and Wellness from the University of New York at Buffalo, NY. Her diverse background in business administration includes fine art studio management, digital art sales, and fundraising for Hunter’s Hope Foundation, a nonprofit dedicated to raising awareness and research funding for Leukodystrophy, a rare genetic disease that is currently without a cure.

Our Providers

Donna S. McAllister, PA-C

After graduating from the University of Central Florida with a Bachelor of Science in Radiologic Sciences...

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Thomas L. Ryan PA-C, MPAS

Tom’s service in the Army eventually brought him to Georgia, where he met his wife and worked...

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Whitney L. Rintelman, PA-C

She spent many years working in pediatrics and then ophthalmology, and worked in an occupational...

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Mallory Ann Ledergerber, PA-C

A graduate with a Masters of Science in Physician Assistant Studies from Seton Hill University...

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Mary E. McCourt MSN, FNP, BC, CDE

Mary’s nursing career spans more than 35 years and includes more than 20 years of Family Practice...

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Tricia A. Howard, MHS, PA-C, DFAAPA

Tricia holds a degree in Physician Assistaning and a Master’s degree in Health Science from (MUSC)...

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Our Providers

Donna S. McAllister

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Thomas L. Ryan

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Whitney L. Rintelman

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Mallory Ann Ledergerber

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Mary E. McCourt

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Tricia A. Howard, MHS, PA-C, DFAAPA

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ExperBEAR

“They say that laughter is the best medicine. I love that and I say that hugging must be the second best medicine. That’s why I am so happy and honored to be in charge of all hugging and hugging-related services at all ExperCARE locations and at large.”

Chief Hugging Officer

Chief Hugging Officer

ExperBEAR

“They say that laughter is the best medicine. I love that and I say that hugging must be the second best medicine. That’s why I am so happy and honored to be in charge of all hugging and hugging-related services at all ExperCARE locations and at large.”

ExperCARE is always looking for amazing talent to add to our team.

If you’re at the top of your field and love helping people, we want to hear from you!

ExperCARE is always looking for amazing talent to add to our team.

If you’re at the top of your field and love helping people, we want to hear from you!