Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Christina Grassi

Specialist in Mount Sinai, NY · enumerated 2007.

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

National Provider Identifier

1649452889

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Registry record

Entity type Individual (Type 1)

Name Christina Grassi

Sex Female

Practice address 701 Route 25a, Suite B1, Mount Sinai, NY, 11766

Phone (631) 331-4403

Enumeration date Nov 29, 2007

Last updated in NPPES Nov 29, 2007

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 304655 (NY) Primary

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

Is NPI 1649452889 active?

Yes, as of the latest NPPES snapshot, NPI 1649452889 is active (record last updated 2007-11-29).

How do I verify Christina Grassi's NPI record?

Cross-check NPI 1649452889 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-11-29.