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

Alexander S Elfenbein Physician PC

Organization Internal Medicine Physician · NPI 1801968912

Alexander S Elfenbein Physician PC is an Internal Medicine Physician in Valley Stream, New York. Licensed in New York. Registered with an NPI since 2006.

Licensed in
NY
In the registry since
2006
Specialties on file
3
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

40 E Merrick Rd Ste 104
Valley Stream, NY 11580-5947
Phone: (516) 568-2121
Fax: (516) 568-0426
Show map & directions

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

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence 1637251 (NY)
Internal Medicine Physician Taxonomy 207R00000X · Licence 1637251 (NY)
Geriatric Medicine (Internal Medicine) Physician Taxonomy 207RG0300X · Licence 1637251 (NY)

Record details

NPI number1801968912
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Alexander Elfenbein — Owner · (516) 568-2121
NPI enumeratedNovember 14, 2006
Last updated in NPPESSeptember 11, 2025
Mailing address40 East Merrick Road, Ste 104, Valley Stream, NY 11580-5947

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