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All practices located at 222 Westchester Avenue are currently closed.
If you had a scheduled appointment, a member of our team will contact you to reschedule.

Effective Monday, September 29, 2025, Outpatient Physical Therapy patients will be seen at 244 Westchester Avenue, Suite 217, West Harrison, NY 10602

If you have any questions, please call us at 914.681.1116

We appreciate your understanding.

Sean Cloonan, MD

Scarsdale Medical Group
Castle Connolly Top Doctors
4.843 patient ratings
7 patient comments
Read patient comments

About Ratings and Reviews

The star rating score is an average of all responses to care provider related questions on our independent rating system, the Press Ganey Patient Satisfaction Survey. Responses are measured on a scale of 1 to 5, with 5 being the best score. Learn more about our patient satisfaction survey.

Practice location

Gender Male
Languages English
Board certification

Infectious Disease

Undergraduate school Harvard University
Medical school New York University School of Medicine
Internship NYU Medical Center/Bellevue Hospital
Residency NYU Medical Center/Bellevue Hospital
Fellowship NYU Medical Center/Bellevue Hospital
Group Scarsdale Medical Group
Accepted insurance View accepted health insurance plans

About

Sean J. Cloonan, MD earned a B.A. in literature from Harvard University before attending the School of Medicine at New York University. Dr. Cloonan completed his internship and residency in internal medicine at New York University (NYU) and a sub-specialty fellowship in infectious diseases also at NYU, where he was Fellow of the Year. He is board-certified in internal medicine and infectious diseases.

Previously, Dr. Cloonan was a clinical instructor at New York University and engaged in research at NYU and the Manhattan VA. He has been on staff at several hospitals throughout Westchester and New York City. Dr. Cloonan was the recipient of several awards including the Valentine Mott Medal and Mandelbaum Award while pursuing his medical degree at NYU.

Dr. Cloonan’s clinical interests include treatment of Hepatitis C, HIV prevention and treatment, tick borne infections, diabetic foot infections and travel medicine.

Patient Ratings & Comments

Patient comments are gathered from the Press Ganey Patient Satisfaction Survey. Comments are displayed in their entirety and are anonymous for patient privacy.

8/25/2025
Dr. Cloonan is great!
6/2/2025
Dr. Cloonan was attentive, thoughtful, explained all, listened thoroughly, patiently fielded my questions & concerns.
5/26/2025
Dr. Sean Cloonan is a model care provider. I was extremely pleased with his level of care, service, competency and genuine concern
2/21/2025
Dr. Cloonan is great!

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