Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

St. Catherine of Siena Medical Center

General Acute Care Hospital in Smithtown, NY · enumerated 2006 · authorized official Augustus Mantia, Chief Medical Officer.

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

National Provider Identifier

1053497248

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Registry record

Entity type Organization (Type 2)

Legal business name St. Catherine of Siena Medical Center

Practice address 50 Route 25a, Smithtown, NY, 11787

Phone (631) 862-3541

Fax (631) 862-3717

Enumeration date Oct 31, 2006

Last updated in NPPES Aug 22, 2020

Taxonomy & classification

282N00000X General Acute Care Hospital Hospitals · License F-332622 (NY) Primary

Authorized official

Name Augustus Mantia

Title Chief Medical Officer

Phone (631) 862-3100

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 is St. Catherine of Siena Medical Center located?

The practice location on file with NPPES is in Smithtown, NY.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2020-08-22. Verify at npiregistry.cms.hhs.gov.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.