Maureen Donnelly Passaro, MD

University	Degree	Focus	Graduated
New York Medical College	Medical Degree		1990

Institution	Focus	Year
Residency - Stamford Hospital, Connecticut		1993
Internship - Stamford Hospital, Connecticut		Not Specified
Fellowship - National Institute of Health		1996
Continuing Medical Education (CME) - Stamford Hospital, Stamford, CT	Internal Medicine	Not Specified

Certification	Cert. Body	Year
Internal medicine	Internal Medicine	Not Specified

Distinction	Institution	Year
	Washington, DC-Baltimore-Northern Virginia Super Doctors	2011

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Review by Anonymous on January 14, 2026 -

MedStar Health Primary Care at Olney 18109 Prince Philip - 18109 Prince Philip Drive Suite B-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 Passaro is an excellent docto... ”

Dr Passaro is an excellent doctor and I would recommend her to everyone.

Verified Patient

“Dr Passaro is an excellent docto...”

Dr Passaro is an excellent doctor and I would recommend her to everyone.

Anonymous 01/14/2026

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Review by Anonymous on December 12, 2025 -

MedStar Health Primary Care at Olney 18109 Prince Philip - 18109 Prince Philip Drive Suite B-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. Passaro is wonderful, kind a... ”

Dr. Passaro is wonderful, kind and caring

Verified Patient

“Dr. Passaro is wonderful, kind a...”

Dr. Passaro is wonderful, kind and caring

Anonymous 12/12/2025

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Review by Anonymous on November 11, 2025 -

MedStar Health Primary Care at Olney 18109 Prince Philip - 18109 Prince Philip Drive Suite B-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 spent a lot of time t... ”

The doctor spent a lot of time talking about things that weren't related to my health. I would appreciate more time spent discussing my health.

Verified Patient

“The doctor spent a lot of time t...”

The doctor spent a lot of time talking about things that weren't related to my health. I would appreciate more time spent discussing my health.

Anonymous 11/11/2025

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Review by Anonymous on September 20, 2025 -

MedStar Health Primary Care at Olney 18109 Prince Philip - 18109 Prince Philip Drive Suite B-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
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ Knows my health history and expl... ”

Knows my health history and explains why or why not changes should/could be made!

Verified Patient

“Knows my health history and expl...”

Knows my health history and explains why or why not changes should/could be made!

Anonymous 09/20/2025

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Review by Anonymous on June 21, 2025 -

MedStar Health Primary Care at Olney 18109 Prince Philip - 18109 Prince Philip Drive Suite B-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. Passaro is insightful, pleas... ”

Dr. Passaro is insightful, pleasant, and helpful and always takes the time to listen to my concerns. She never makes me feel rushed and she never neglects to provide useful feedback.

Verified Patient

“Dr. Passaro is insightful, pleas...”

Dr. Passaro is insightful, pleasant, and helpful and always takes the time to listen to my concerns. She never makes me feel rushed and she never neglects to provide useful feedback.

Anonymous 06/21/2025

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Review by Anonymous on January 14, 2026 -

MedStar Health Primary Care at Olney 18109 Prince Philip - 18109 Prince Philip Drive Suite B-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 - “ My care has been provided mainly... ”

My care has been provided mainly by Dr Passaro.

Verified Patient

“My care has been provided mainly...”

My care has been provided mainly by Dr Passaro.

Anonymous 01/14/2026

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Review by Anonymous on December 10, 2025 -

MedStar Health Primary Care at Olney 18109 Prince Philip - 18109 Prince Philip Drive Suite B-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 passaro is so wonderful... ”

Dr passaro is so wonderful

Verified Patient

“Dr passaro is so wonderful...”

Dr passaro is so wonderful

Anonymous 12/10/2025

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Review by Anonymous on October 22, 2025 -

MedStar Health Primary Care at Olney 18109 Prince Philip - 18109 Prince Philip Drive Suite B-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 - “ Relaxed and pleasant visit... ”

Relaxed and pleasant visit

Verified Patient

“Relaxed and pleasant visit...”

Relaxed and pleasant visit

Anonymous 10/22/2025

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Review by Anonymous on July 12, 2025 -

MedStar Health Primary Care at Olney 18109 Prince Philip - 18109 Prince Philip Drive Suite B-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
Trust in Decision Making Not rated
Accuracy of Diagnosis Not rated
Post-Visit Follow-Up Not rated

Comment - “ Care provider was attentive, foc... ”

Care provider was attentive, focused, personable and showed personal interest.

Verified Patient

“Care provider was attentive, foc...”

Care provider was attentive, focused, personable and showed personal interest.

Anonymous 07/12/2025

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Review by Anonymous on May 12, 2025 -

MedStar Health Primary Care at Olney 18109 Prince Philip - 18109 Prince Philip Drive Suite B-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 recommend Dr. Passaro to every... ”

I recommend Dr. Passaro to every diabetic I know!

Verified Patient

“I recommend Dr. Passaro to every...”

I recommend Dr. Passaro to every diabetic I know!

Anonymous 05/12/2025

Office Hours

Internal Medicine Physician - Endocrinology, Diabetes & Metabolism

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MedStar Health Primary Care at Olney 18109 Prince Philip

Practice Colleagues

Mohammad Ali, MD - Internal Medicine Physician

Eileen Wiesenberger, DO - Internal Medicine Physician

Maryam Movassaghian, MD - Internal Medicine Physician

Aashish Dewan, MD - Family Medicine Physician

Frederick Finelli, MD - Surgeon

Ryann Brickley, CRNP - Nurse Practitioner

Melanie Grady, MD - Family Medicine Physician

April Tweedt, DO - Family Medicine Physician

Procedures & Services

Procedures & Treatments Offered

Commonly Prescribed Medications

Accepted Insurance

Accepted Insurance