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ALFONSO TAN MD PC
NPI 1548348758
Internal Medicine in Sayville, NY

Active since November 02, 2006
297 W MAIN ST, SAYVILLE, NY 11782(631) 589-2323(631) 589-9069 Get Directions Write a Review

NPPES record last updated: November 2, 2007. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Alfonso Tan Md Pc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

ALFONSO TAN MD PC (NPI 1548348758) is a healthcare organization registered as an internal medicine in Sayville, New York and active in the NPI registry since November 2006. The organization lists Alfonso Tan, President, as its authorized official.

NPPES Registry Identity

NPI1548348758
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameALFONSO TAN MD PC
Location Address297 W MAIN STSayville, NY 11782-2523
Mailing Address297 W Main StSayville, NY 11782-2523 · (631) 589-2323 · Fax (631) 589-9069
Phone(631) 589-2323
Fax(631) 589-9069
Organization SubpartNo
Authorized OfficialAlfonso TanPresident · (631) 589-2323
Enumeration DateNovember 2, 2006
Last NPPES UpdateNovember 2, 2007
✔ NPI 1548348758 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in NY · 115465
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
297 W MAIN ST, Sayville, NY 11782
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Other Identifiers 3

Medicare UPINB78020NY
Medicare PINWZZRV1NY
Medicaid00213052NY

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ALFONSO TAN M.D.
Internal Medicine
297 W MAIN ST
SAYVILLE, NY 11782
Suffolk County (631) 589-2323

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Alfonso Tan MD PC's NPI number?

The NPI number for Alfonso Tan MD PC is 1548348758. It was assigned to this organization in the NPPES registry on November 2, 2006.

Where is Alfonso Tan MD PC located?

Alfonso Tan MD PC is located at 297 W Main St, Sayville, NY 11782. The listed phone number is (631) 589-2323.

What is Alfonso Tan MD PC's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

When was this NPI record last updated?

The NPPES record for Alfonso Tan MD PC was last updated on November 2, 2007, 18 years ago. NPI Profile syncs with the weekly NPPES data releases published by CMS; the most recent full sync was completed on July 26, 2026. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.