Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Sylvia Alonso, O.D.
Optometrist in New York, NY · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1619006178
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Registry record
Entity type Individual (Type 1)
Name Sylvia Alonso
Credential O.D.
Sex Female
Practice address 229 E 79th St, New York, NY, 10075
Phone (212) 861-6200
Enumeration date Mar 2, 2007
Last updated in NPPES Jan 12, 2017
Taxonomy & licenses
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD credential
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
How do I verify Sylvia Alonso's NPI record?
Cross-check NPI 1619006178 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1619006178 active?
Yes, as of the latest NPPES snapshot, NPI 1619006178 is active (record last updated 2017-01-12).
Other providers at this practice address
Browse all → Lisa Kingsly Optometrist · New York, NY NPI 1164610549 Jonathan Vapnek MD PC Urology Physician · New York, NY NPI 1780863415 Julius Shulman MD PC Ophthalmology Physician · New York, NY NPI 1922278910 East Side Primary Medical Care, P.C. Internal Medicine Physician · New York, NY NPI 1508008996 Allie Nadelson Retina Specialist (Ophthalmology) Physician · New York, NY NPI 1942599618 Premire Physicians of New York Pllc Urology Physician · New York, NY NPI 1780938852 Premier Physicians of New York Pllc Urology Physician · New York, NY NPI 1427302942
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-01-12.