Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Alfonso Tan, MD

Individual provider Internal Medicine Physician · NPI 1588689566

Alfonso Tan, MD is an Internal Medicine Physician in Sayville, New York. Practices as a sole proprietor. Licensed in New York.

Licensed in
NY
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

297 W Main St
Sayville, NY 11782-2523
Phone: (631) 589-2323
Fax: (631) 589-9069
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 115465 (NY)

Record details

NPI number1588689566
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJuly 12, 2006
Last updated in NPPESJuly 8, 2007
Mailing address297 W Main St, Sayville, NY 11782-2523

Other providers in Sayville