Diana Mazzei, MD

University	Degree	Focus	Graduated
Universidad Centroccidental Lisandro Alvarado \| Barquisimeto, Venezuela, South America	Doctorate	Other	2011
American Board of Internal Medicine (Board Certification)	Other Degree	Internal Medicine	2022

Institution	Focus	Year
Residency - St. Joseph’s University Medical Center \| Paterson, New Jersey	Other	2022

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Review by Anonymous on April 05, 2026 -

Houston Methodist Primary Care Group - 9915 Barker Cypress Road - Suite 200 - 77433 - 9915 Barker Cypress Road Suite 200

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
Clear explanations
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ Dr. Mazzei listened to my concer... ”

Dr. Mazzei listened to my concerns with no judgement. She offered lots of support and recommendations and I felt heard.

Verified Patient

“Dr. Mazzei listened to my concer...”

Dr. Mazzei listened to my concerns with no judgement. She offered lots of support and recommendations and I felt heard.

Anonymous 04/05/2026

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Review by Anonymous on February 11, 2026 -

Houston Methodist Primary Care Group - 9915 Barker Cypress Road - Suite 200 - 77433 - 9915 Barker Cypress Road Suite 200

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
Clear explanations
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ Dr. Mazzie and staff are excelle... ”

Dr. Mazzie and staff are excellent.

Verified Patient

“Dr. Mazzie and staff are excelle...”

Dr. Mazzie and staff are excellent.

Anonymous 02/11/2026

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Review by Anonymous on January 17, 2026 -

Houston Methodist Primary Care Group - 9915 Barker Cypress Road - Suite 200 - 77433 - 9915 Barker Cypress Road Suite 200

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
Clear explanations
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ She's always very informative an... ”

She's always very informative and shows interest in my care and my personal wellbeing.

Verified Patient

“She's always very informative an...”

She's always very informative and shows interest in my care and my personal wellbeing.

Anonymous 01/17/2026

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Review by Anonymous on January 09, 2026 -

Houston Methodist Primary Care Group - 9915 Barker Cypress Road - Suite 200 - 77433 - 9915 Barker Cypress Road Suite 200

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
Clear explanations
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ Wonderful as always... ”

Wonderful as always

Verified Patient

“Wonderful as always...”

Wonderful as always

Anonymous 01/09/2026

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Review by Anonymous on November 25, 2025 -

Houston Methodist Primary Care Group - 9915 Barker Cypress Road - Suite 200 - 77433 - 9915 Barker Cypress Road Suite 200

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
Clear explanations
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ Great experience... ”

Great experience

Verified Patient

“Great experience...”

Great experience

Anonymous 11/25/2025

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Review by Anonymous on March 25, 2026 -

Houston Methodist Primary Care Group - 9915 Barker Cypress Road - Suite 200 - 77433 - 9915 Barker Cypress Road Suite 200

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 recommend Dr. Mazzei to all my... ”

I recommend Dr. Mazzei to all my friends and family. She is wonderful. I feel like she really listens and takes the time to explain.

Verified Patient

“I recommend Dr. Mazzei to all my...”

I recommend Dr. Mazzei to all my friends and family. She is wonderful. I feel like she really listens and takes the time to explain.

Anonymous 03/25/2026

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Review by Anonymous on January 18, 2026 -

Houston Methodist Primary Care Group - 9915 Barker Cypress Road - Suite 200 - 77433 - 9915 Barker Cypress Road Suite 200

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
Clear explanations
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ Dr. Massie and assistant are bot... ”

Dr. Massie and assistant are both awesome; knowledgeable, caring, and have great Beside manners. I have recommended Dr. To numerous friend and relatives

Verified Patient

“Dr. Massie and assistant are bot...”

Dr. Massie and assistant are both awesome; knowledgeable, caring, and have great Beside manners. I have recommended Dr. To numerous friend and relatives

Anonymous 01/18/2026

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Review by Anonymous on January 15, 2026 -

Houston Methodist Primary Care Group - 9915 Barker Cypress Road - Suite 200 - 77433 - 9915 Barker Cypress Road Suite 200

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
Clear explanations
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ Excellent doctor. I have already... ”

Excellent doctor. I have already referred my sister to her

Verified Patient

“Excellent doctor. I have already...”

Excellent doctor. I have already referred my sister to her

Anonymous 01/15/2026

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Review by Anonymous on December 12, 2025 -

Houston Methodist Primary Care Group - 9915 Barker Cypress Road - Suite 200 - 77433 - 9915 Barker Cypress Road Suite 200

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
Clear explanations
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ I love my doctor and everyone fr... ”

I love my doctor and everyone from the front desk to the medical assistant is a pleasure to deal with.

Verified Patient

“I love my doctor and everyone fr...”

I love my doctor and everyone from the front desk to the medical assistant is a pleasure to deal with.

Anonymous 12/12/2025

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Review by Anonymous on November 12, 2025 -

Houston Methodist Primary Care Group - 9915 Barker Cypress Road - Suite 200 - 77433 - 9915 Barker Cypress Road Suite 200

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
Clear explanations
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ The doctor was attentive, unders... ”

The doctor was attentive, understanding of my Issues, and gave me thoughtful answers. She did not appear rushed or in a hurry. In fact, she went out of her way to answer one of my questions in detail and explain the options.

Verified Patient

“The doctor was attentive, unders...”

Anonymous 11/12/2025

Office Hours

Internal Medicine Physician - General

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Office & Staff Evaluation Not rated

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Houston Methodist Primary Care Group

Practice Colleagues

Norma Islam, DO - Family Medicine Physician

Belmund Catague, MD, MPH - Family Medicine Physician

Sharleen Botero, NP - Nurse Practitioner

Dipo Kusemiju, MD - Family Medicine Physician

Jennifer Pak, DO - Family Medicine Physician

Hsin Li, DO, MPH - Family Medicine Physician

Gabriela Nicola, MD - Internal Medicine Physician

Alison Pain, MD - Family Medicine Physician

Ketaki Patel, MD - Internal Medicine Physician

Fizza Hirani, MD - Internal Medicine Physician

Procedures & Services

Procedures & Treatments Offered

Commonly Prescribed Medications

Accepted Insurance

Accepted Insurance