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

Ruth G. Diaz MD PC

Organization Internal Medicine Physician · NPI 1265559884

Ruth G. Diaz MD PC is an Internal Medicine Physician in Smithtown, New York. Registered with an NPI since 2007.

In the registry since
2007
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

994 W Jericho Tpke Ste 201
Smithtown, NY 11787-3234
Phone: (631) 265-4200
Fax: (631) 265-4290
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X

Record details

NPI number1265559884
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Ruth Diaz — Owner · (631) 265-4200
NPI enumeratedMarch 26, 2007
Last updated in NPPESAugust 6, 2018
Mailing address994 W Jericho Tpke Ste 201, Smithtown, NY 11787-3234

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