Shawn K Mathias, MD

Certification	Cert. Body	Year
Internal medicine	Internal Medicine	Not Specified

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Review by Anonymous on February 26, 2026 -

Upstate Cardiology Clemson - 212 Frontage Road

Office & Staff Evaluation

Practice Evaluation

Ease of Getting an Appointment Not rated
Courtesy of Practice Staff Not rated
Appearance & Atmosphere of Office Not rated
Handling of Billing & Insurance Not rated
Average Wait Time Not rated

Provider Evaluation

Willingness to Spend Time with You Not rated
Listening Skills Not rated
Clear explanations Not rated
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ Doctor Mathias and the team save... ”

Doctor Mathias and the team saved my life a couple of years back by clearing blockage and installing three stents. I AM MOST GRATEFUL!

Verified Patient

“Doctor Mathias and the team save...”

Doctor Mathias and the team saved my life a couple of years back by clearing blockage and installing three stents. I AM MOST GRATEFUL!

Anonymous 02/26/2026

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Review by Anonymous on January 15, 2026 -

Upstate Cardiology Clemson - 212 Frontage Road

Office & Staff Evaluation

Practice Evaluation

Ease of Getting an Appointment Not rated
Courtesy of Practice Staff Not rated
Appearance & Atmosphere of Office Not rated
Handling of Billing & Insurance Not rated
Average Wait Time Not rated

Provider Evaluation

Willingness to Spend Time with You Not rated
Listening Skills Not rated
Clear explanations Not rated
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ Dr. Mathias is excellent. I trus... ”

Dr. Mathias is excellent. I trust him with my health issues. He is thorough.

Verified Patient

“Dr. Mathias is excellent. I trus...”

Dr. Mathias is excellent. I trust him with my health issues. He is thorough.

Anonymous 01/15/2026

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Review by Anonymous on December 03, 2025 -

Upstate Cardiology Clemson - 212 Frontage Road

Office & Staff Evaluation

Practice Evaluation

Ease of Getting an Appointment Not rated
Courtesy of Practice Staff Not rated
Appearance & Atmosphere of Office Not rated
Handling of Billing & Insurance Not rated
Average Wait Time Not rated

Provider Evaluation

Willingness to Spend Time with You Not rated
Listening Skills Not rated
Clear explanations Not rated
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ No problems... ”

No problems

Verified Patient

“No problems...”

No problems

Anonymous 12/03/2025

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Review by Anonymous on September 20, 2025 -

Upstate Cardiology Clemson - 212 Frontage Road

Office & Staff Evaluation

Practice Evaluation

Ease of Getting an Appointment Not rated
Courtesy of Practice Staff Not rated
Appearance & Atmosphere of Office Not rated
Handling of Billing & Insurance Not rated
Average Wait Time Not rated

Provider Evaluation

Willingness to Spend Time with You Not rated
Listening Skills Not rated
Clear explanations Not rated
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ Thank you... ”

Thank you

Verified Patient

“Thank you...”

Thank you

Anonymous 09/20/2025

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Review by Anonymous on September 13, 2025 -

Upstate Cardiology Clemson - 212 Frontage Road

Office & Staff Evaluation

Practice Evaluation

Ease of Getting an Appointment Not rated
Courtesy of Practice Staff Not rated
Appearance & Atmosphere of Office Not rated
Handling of Billing & Insurance Not rated
Average Wait Time Not rated

Provider Evaluation

Willingness to Spend Time with You Not rated
Listening Skills Not rated
Clear explanations Not rated
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ I have minimal anxiety from the ... ”

I have minimal anxiety from the time I begin the appointment until the time I leave.

Verified Patient

“I have minimal anxiety from the ...”

I have minimal anxiety from the time I begin the appointment until the time I leave.

Anonymous 09/13/2025

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Review by Anonymous on February 01, 2026 -

Upstate Cardiology Clemson - 212 Frontage Road

Office & Staff Evaluation

Practice Evaluation

Ease of Getting an Appointment Not rated
Courtesy of Practice Staff Not rated
Appearance & Atmosphere of Office Not rated
Handling of Billing & Insurance Not rated
Average Wait Time Not rated

Provider Evaluation

Willingness to Spend Time with You Not rated
Listening Skills Not rated
Clear explanations Not rated
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ Dr Mathias was amazing with my m... ”

Dr Mathias was amazing with my mom who has pretty severe dementia! Very caring and excellent bedside manner!

Verified Patient

“Dr Mathias was amazing with my m...”

Dr Mathias was amazing with my mom who has pretty severe dementia! Very caring and excellent bedside manner!

Anonymous 02/01/2026

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Review by Anonymous on January 02, 2026 -

Upstate Cardiology Clemson - 212 Frontage Road

Office & Staff Evaluation

Practice Evaluation

Ease of Getting an Appointment Not rated
Courtesy of Practice Staff Not rated
Appearance & Atmosphere of Office Not rated
Handling of Billing & Insurance Not rated
Average Wait Time Not rated

Provider Evaluation

Willingness to Spend Time with You Not rated
Listening Skills Not rated
Clear explanations Not rated
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ Dr. Mathias is an excellent list... ”

Dr. Mathias is an excellent listener. He is straight forward and informative. He was extremely helpful to my decision making vis a vis the possibility of a surgical procedure. In addition, he is very clear in his discussion of prescribed medication.

Verified Patient

“Dr. Mathias is an excellent list...”

Anonymous 01/02/2026

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Review by Anonymous on October 16, 2025 -

Upstate Cardiology Clemson - 212 Frontage Road

Office & Staff Evaluation

Practice Evaluation

Ease of Getting an Appointment Not rated
Courtesy of Practice Staff Not rated
Appearance & Atmosphere of Office Not rated
Handling of Billing & Insurance Not rated
Average Wait Time Not rated

Provider Evaluation

Willingness to Spend Time with You Not rated
Listening Skills Not rated
Clear explanations Not rated
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ Very good.... ”

Very good.

Verified Patient

“Very good....”

Very good.

Anonymous 10/16/2025

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Review by Anonymous on September 19, 2025 -

Upstate Cardiology Clemson - 212 Frontage Road

Office & Staff Evaluation

Practice Evaluation

Ease of Getting an Appointment Not rated
Courtesy of Practice Staff Not rated
Appearance & Atmosphere of Office Not rated
Handling of Billing & Insurance Not rated
Average Wait Time Not rated

Provider Evaluation

Willingness to Spend Time with You Not rated
Listening Skills Not rated
Clear explanations Not rated
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ No complaint... ”

No complaint

Verified Patient

“No complaint...”

No complaint

Anonymous 09/19/2025

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Review by Anonymous on September 08, 2025 -

Upstate Cardiology Clemson - 212 Frontage Road

Office & Staff Evaluation

Practice Evaluation

Ease of Getting an Appointment Not rated
Courtesy of Practice Staff Not rated
Appearance & Atmosphere of Office Not rated
Handling of Billing & Insurance Not rated
Average Wait Time Not rated

Provider Evaluation

Willingness to Spend Time with You Not rated
Listening Skills Not rated
Clear explanations Not rated
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ Dr. Mathis answered all my quest... ”

Dr. Mathis answered all my questions and my worries. Very compassionate physician.

Verified Patient

“Dr. Mathis answered all my quest...”

Dr. Mathis answered all my questions and my worries. Very compassionate physician.

Anonymous 09/08/2025

Office Hours

Internal Medicine Physician - General

Highlights

Biography

Featured Review See More Reviews

Summary

Provider Training

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Specialties

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Medical Specialties

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Reviews

Office & Staff Evaluation Not rated

Locations

Affiliated Practices

Upstate Cardiology Clemson

Upstate Cardiology Easley

Upstate Cardiology Greenville

Practice Colleagues

Daniel Green, MD - Internal Medicine Physician

Jonathan Hanson, DO - Internal Medicine Physician

Melissa Phillips, APRN-CNP - Internal Medicine Physician, Nurse Practitioner

Gregory San, MD - Internal Medicine Physician

James Merriam, MD - Internal Medicine Physician

Brad Simpson, MD - Internal Medicine Physician

Arthur Siachos, MD - Internal Medicine Physician

Zachary Dowdy, MD - Internal Medicine Physician

Mark Grabarczyk, MD - Internal Medicine Physician

Barbara Moran-Faile, MD - Internal Medicine Physician

Procedures & Services

Procedures & Treatments Offered

Commonly Prescribed Medications

Accepted Insurance

Accepted Insurance