Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alyssa Korenstein, MD

Family Medicine Physician in New York, NY · enumerated 2017.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1801320825

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Registry record

Entity type Individual (Type 1)

Name Alyssa Korenstein

Credential MD

Sex Female

Practice address 25 Hudson St, New York, NY, 10013

Phone (888) 663-6331

Fax (415) 252-7176

Enumeration date Apr 17, 2017

Last updated in NPPES Mar 19, 2025

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 0000000 (AZ) Secondary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License 303024 (NY) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does Alyssa Korenstein practice?

The practice location on file with NPPES is in New York, NY. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Alyssa Korenstein?

The National Provider Identifier (NPI) for Alyssa Korenstein is 1801320825, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-03-19.