Internal Medicine, Cardiovascular Disease
ALEXANDER S ELFENBEIN PHYSICIAN PC
Identity confirmed via CMS NPPES · September 30, 2026 · A directory match is not a coverage approval.
Is this your practice? This listing was imported from public provider identity data (CMS NPPES) and has not yet been claimed. Claim this listing to confirm the practice details. Plan acceptance stays unpublished until the practice reports it.
Public record
NPI 1801968912 · enumerated 2006-11-14 · record updated 2025-09-11. Source: CMS NPPES. A listing is not a TRICARE network approval.
NPPES recordGoogle Maps Apple Maps OpenStreetMap
Authorized official: ALEXANDER ELFENBEIN MD, Owner · (516) 568-2121
Addresses and phones
- Mailing address 40 EAST MERRICK ROAD, STE 104, VALLEY STREAM, NY, 11580-5947 (516) 568-2121 Fax (516) 568-0426 Google Maps Apple Maps OpenStreetMap
- Practice location 40 EAST MERRICK ROAD, STE 104, VALLEY STREAM, NY, 11580-5947 (516) 568-2121 Fax (516) 568-0426 Google Maps Apple Maps OpenStreetMap
Specialties
- Internal Medicine 207R00000X · License 1637251 NY
- Internal Medicine, Geriatric Medicine 207RG0300X · License 1637251 NY
- Internal Medicine, Cardiovascular Disease 207RC0000X · Primary · License 1637251 NY
In this directory
NY Nassau County Valley Stream Internal Medicine, Cardiovascular Disease
Locations and evidence
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Practice location
VALLEY STREAM, NY, 115805947
Accepting new patientsNot reportedCMS NPPES · September 30, 2026
Plan acceptance
- No published plan acceptance yet. Confirm directly with the practice, or claim this listing if it's yours.