4
27 Ratings with 7 written Reviews
Summary
Dr. Mark Tan has practiced rheumatology and internal medicine for 43 years, treating rheumatoid arthritis, osteoarthritis, and knee osteoarthritis, and performing chemotherapy and intravenous chemotherapy. He is affiliated with Saint Catherine of Siena Medical Center and South Shore University Hospital. Dr. Tan earned his medical degree from the Jacobs School of Medicine and Biomedical Sciences at the University of Buffalo and sees patients in Smithtown and Bay Shore, New York.
Overview based on verified provider data
Quick Facts
- accepting new patients
- 43 years of experience
- speaks English
- Jacobs School Of Medicine & Biomedical Sciences At The Univ Of Buffalo
- 7 written reviews
- 2 specialties
- 10 areas of expertise
- 2 hospital affiliations
- 3 office locations
- Male
Patients’ Perspective
- Gave an accurate diagnosis
- Had a good bedside manner
- Spent time with me
Based on patient feedback. Read the reviews
Office Locations
Dr. Mark Tan has 3 locationsTan Mark Office
222 E Main St Ste 312Smithtown, NY 11787 Tel: (631) 724-8900
Mon8:00 am - 5:00 pm
Tue8:00 am - 5:00 pm
Wed8:00 am - 7:00 pm
Thu8:00 am - 3:00 pm
Fri8:00 am - 5:00 pm
SatClosed
SunClosed
Compare with Similar Doctors
 |  |  |  |
| Dr. Mark Tan, MD | Dr. Lauren Robinson, MD | Dr. Michael Lee Gross, MD | Patrick William Kelley |
| Rheumatology | Rheumatology | Rheumatology | Public Health & General Preventive Medicine |
| Accepts New Patients | Accepts New Patients | Accepts New Patients | Accepts New Patients |
| 43 Years of Experience | 9 Years of Experience | 31 Years of Experience | 47 Years of Experience |
| No Virtual Visit Option | No Virtual Visit Option | Virtual Visit Available | No Virtual Visit Option |
| Speaks English | Speaks English, Spanish | ||
| Smithtown , NY | Stamford , CT | Paramus , NJ | Fairfield , CT |
| Med School: Jacobs School Of Medicine & Biomedical Sciences At The Univ Of Buffalo | Med School: University Of Connecticut School Of Medicine | Med School: Sackler School Of Medicine | Med School: University Of Virginia School Of Medicine |
Current Profile | View Profile | View Profile | View Profile |
Insurance Plans Accepted by Dr. Mark Tan
Medical Specialties
Dr. Mark Tan has the following 2 specialties
Specialty Expertise
Dr. Mark Tan has the following 10 areas of expertise
Certifications, License, & Education
43 Years Experience
Dr. Mark Tan holds an expired medical license in the state of New York.
Medical License
Medical Doctor with an expired medical license in the state of New York that expired in 2026.
Education & Training
Medical School
Graduated from Jacobs School Of Medicine & Biomedical Sciences At The Univ Of Buffalo in 1983.
NPI Number
Dr. Tan's NPI number is 1083770580.
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Frequently Asked Questions
- What languages does Dr. Mark Tan speak?
- Dr. Mark Tan speaks English.
- Is Dr. Mark Tan accepting new patients?
- Dr. Mark Tan is accepting new patients on Vitals. View Dr. Mark Tan's profile on Vitals to make an appointment.
- Which hospitals is Dr. Mark Tan affiliated with?
- Dr. Mark Tan is affiliated with Saint Catherine Of Siena Medical Center and South Shore University Hospital.
- Does Dr. Mark Tan accept my insurance?
- You can see the insurance plans that Dr. Mark Tan accepts on their Vitals profile.
- How can I make an appointment with Dr. Mark Tan?
- You can find contact information for Dr. Mark Tan here on Vitals.
Data Sources
This provider profile is built using data from:
- NPPES NPI Registry
- State medical licensing boards
- Healthcare system and provider network data
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