Winston Marshall, MD

University	Degree	Focus	Graduated
University of Texas Southwestern Medical School (Education)	Other Degree	Other	1993

Institution	Focus	Year
Residency - Baylor University Medical Center	Internal Medicine	1996
Fellowship - Baylor University Medical Center	Cardiology	1999
Internship - Baylor University Medical Center	Internal Medicine	1994

Certification	Cert. Body	Year
Internal medicine	Internal Medicine	Not Specified

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Review by Anonymous on April 10, 2026 -

Baylor Scott & White The Heart Group - McKinney - 5236 W University Dr Ste 4450

Office & Staff Evaluation

Practice Evaluation

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

Provider Evaluation

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

Comment - “ Very friendly and concerned. Tr... ”

Very friendly and concerned. Truly like him and his staff very much.

Verified Patient

“Very friendly and concerned. Tr...”

Very friendly and concerned. Truly like him and his staff very much.

Anonymous 04/10/2026

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Review by Anonymous on April 01, 2026 -

Baylor Scott & White The Heart Group - McKinney - 5236 W University Dr Ste 4450

Office & Staff Evaluation

Practice Evaluation

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

Provider Evaluation

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

Comment - “ He is on top of things, if he se... ”

He is on top of things, if he sees or thinks there might be something going on he will do tests

Verified Patient

“He is on top of things, if he se...”

He is on top of things, if he sees or thinks there might be something going on he will do tests

Anonymous 04/01/2026

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Review by Anonymous on March 27, 2026 -

Baylor Scott & White The Heart Group - McKinney - 5236 W University Dr Ste 4450

Office & Staff Evaluation

Practice Evaluation

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

Provider Evaluation

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

Comment - “ Dr Marshall is terrific along wi... ”

Dr Marshall is terrific along with his entire staff !!!

Verified Patient

“Dr Marshall is terrific along wi...”

Dr Marshall is terrific along with his entire staff !!!

Anonymous 03/27/2026

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Review by Anonymous on March 12, 2026 -

Baylor Scott & White The Heart Group - McKinney - 5236 W University Dr Ste 4450

Office & Staff Evaluation

Practice Evaluation

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

Provider Evaluation

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

Comment - “ Best doctor I've ever had... ”

Best doctor I've ever had

Verified Patient

“Best doctor I've ever had...”

Best doctor I've ever had

Anonymous 03/12/2026

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Review by Anonymous on March 11, 2026 -

Baylor Scott & White The Heart Group - McKinney - 5236 W University Dr Ste 4450

Office & Staff Evaluation

Practice Evaluation

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

Provider Evaluation

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

Comment - “ Great people... ”

Great people

Verified Patient

“Great people...”

Great people

Anonymous 03/11/2026

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Review by Anonymous on April 10, 2026 -

Baylor Scott & White The Heart Group - McKinney - 5236 W University Dr Ste 4450

Office & Staff Evaluation

Practice Evaluation

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

Provider Evaluation

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

Comment - “ He gets right to the point... ”

He gets right to the point

Verified Patient

“He gets right to the point...”

He gets right to the point

Anonymous 04/10/2026

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Review by Anonymous on March 31, 2026 -

Baylor Scott & White The Heart Group - McKinney - 5236 W University Dr Ste 4450

Office & Staff Evaluation

Practice Evaluation

Ease of Getting an Appointment
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
Listening Skills
Clear explanations
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ Number 12 if we had it. Dr. Mars... ”

Number 12 if we had it. Dr. Marshall is the very best cardiologist. Love him so much

Verified Patient

“Number 12 if we had it. Dr. Mars...”

Number 12 if we had it. Dr. Marshall is the very best cardiologist. Love him so much

Anonymous 03/31/2026

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Review by Anonymous on March 12, 2026 -

Baylor Scott & White The Heart Group - McKinney - 5236 W University Dr Ste 4450

Office & Staff Evaluation

Practice Evaluation

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

Provider Evaluation

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

Comment - “ Attentive, pleasant, through... ”

Attentive, pleasant, through

Verified Patient

“Attentive, pleasant, through...”

Attentive, pleasant, through

Anonymous 03/12/2026

Open full review

Review by Anonymous on March 12, 2026 -

Baylor Scott & White The Heart Group - McKinney - 5236 W University Dr Ste 4450

Office & Staff Evaluation

Practice Evaluation

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

Provider Evaluation

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

Comment - “ Doctor Marshall has been my card... ”

Doctor Marshall has been my cardiologist since 1998 or 1999 can't remember which. I love and trust him with my life.

Verified Patient

“Doctor Marshall has been my card...”

Doctor Marshall has been my cardiologist since 1998 or 1999 can't remember which. I love and trust him with my life.

Anonymous 03/12/2026

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Review by Anonymous on March 04, 2026 -

Baylor Scott & White The Heart Group - McKinney - 5236 W University Dr Ste 4450

Office & Staff Evaluation

Practice Evaluation

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

Provider Evaluation

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

Comment - “ He's the best Heart Doctor we've... ”

He's the best Heart Doctor we've ever had.

Verified Patient

“He's the best Heart Doctor we've...”

He's the best Heart Doctor we've ever had.

Anonymous 03/04/2026

Office Hours

Internal Medicine Physician - Interventional Cardiology, Internal Medicine Physician - Cardiovascular Disease

Highlights

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Affiliated Practices

Baylor Scott & White The Heart Group - McKinney

Baylor Scott & White The Heart Group - Sherman

Practice Colleagues

Michael Isaac, MD - Internal Medicine Physician

Paul Karagiannis, MD - Internal Medicine Physician

Modar Alom, MD - Internal Medicine Physician

Martin Weiss, DO - Hospitalist, Internal Medicine Physician

JARED CHRISTENSEN, MD - Internal Medicine Physician

Fayez Raza, MD - Internal Medicine Physician

Robert Widmer, MD - Internal Medicine Physician

Luis Bowen, MD - Internal Medicine Physician

Ali Agha, MD - Internal Medicine Physician

Syed Sarmast, MD - Internal Medicine Physician

Procedures & Services

Procedures & Treatments Offered

Commonly Prescribed Medications

Accepted Insurance

Accepted Insurance