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

Alfonso Tan MD PC

Organization Internal Medicine Physician · NPI 1548348758

Alfonso Tan MD PC is an Internal Medicine Physician in Sayville, New York. Licensed in New York. Registered with an NPI since 2006.

Licensed in
NY
In the registry since
2006
What do these letters mean?
PC — Professional corporation
A form of business registration, not a clinical qualification.

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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 number1548348758
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Alfonso Tan — President · (631) 589-2323
NPI enumeratedNovember 2, 2006
Last updated in NPPESNovember 2, 2007
Mailing address297 W Main St, Sayville, NY 11782-2523

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