ALEXANDER S ELFENBEIN PHYSICIAN PC
NPI 1801968912
Internal Medicine - Cardiovascular Disease in Valley Stream, NY

Q: What is Alexander S Elfenbein Physician PC's NPI number?

The NPI number for Alexander S Elfenbein Physician PC is 1801968912. It was assigned to this organization in the NPPES registry on November 14, 2006.

Q: What is Alexander S Elfenbein Physician PC's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Active since November 14, 2006

40 EAST MERRICK ROAD, STE 104, VALLEY STREAM, NY 11580(516) 568-2121(516) 568-0426 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Sep 11, 2025, Aug 22, 2020 (2 updates tracked since 2020).

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About Alexander S Elfenbein Physician Pc NPPES

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

ALEXANDER S ELFENBEIN PHYSICIAN PC (NPI 1801968912) is a healthcare organization registered as a cardiovascular disease in Valley Stream, New York and active in the NPI registry since November 2006. The organization lists Alexander S. Elfenbein, Owner, as its authorized official.

NPPES Registry Identity

NPI1801968912

Entity TypeOrganization

Primary Taxonomy207RC0000X

Legal Business NameALEXANDER S ELFENBEIN PHYSICIAN PC

Location Address40 EAST MERRICK ROAD, STE 104Valley Stream, NY 11580-5947

Mailing Address40 East Merrick Road, Ste 104Valley Stream, NY 11580-5947 · (516) 568-2121 · Fax (516) 568-0426

Phone(516) 568-2121

Fax(516) 568-0426

Organization SubpartNo

Authorized OfficialAlexander S. ElfenbeinOwner · (516) 568-2121

Enumeration DateNovember 14, 2006

Last NPPES UpdateSeptember 11, 20252 updates tracked since enumeration

✔ NPI 1801968912 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RC0000X

License✔ Licensed in NY · 1637251

Definition

An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.

Also ListedInternal MedicineTaxonomy 207R00000X · License 1637251 (NY)

Also ListedInternal Medicine · Geriatric MedicineTaxonomy 207RG0300X · License 1637251 (NY)

Other Identifiers 1

Medicaid01063809NY

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

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 Alexander S Elfenbein Physician PC's NPI number?

The NPI number for Alexander S Elfenbein Physician PC is 1801968912. It was assigned to this organization in the NPPES registry on November 14, 2006.

Where is Alexander S Elfenbein Physician PC located?

Alexander S Elfenbein Physician PC is located at 40 East Merrick Road Ste 104, Valley Stream, NY 11580. The listed phone number is (516) 568-2121.

What is Alexander S Elfenbein Physician PC's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

When was this NPI record last updated?

The NPPES record for Alexander S Elfenbein Physician PC was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months ago. 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.