Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

St. Catherine of Siena Medical Center

End-Stage Renal Disease (ESRD) Treatment Clinic/Center in Smithtown, NY · enumerated 2006 · authorized official John Pohlman, Vp Finance.

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

National Provider Identifier

1972562239

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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) 862-3000

Enumeration date Mar 23, 2006

Last updated in NPPES Nov 17, 2016

Taxonomy & classification

261QE0700X End-Stage Renal Disease (ESRD) Treatment Clinic/Center Ambulatory Health Care Facilities Primary

Authorized official

Name John Pohlman

Title Vp Finance

Phone (631) 862-3107

Other identifiers

Identifier	Type	State	Issuer
03010184	Medicaid	NY	-
000335	Other	NY	BLUE CROSS

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.

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Frequently asked questions

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2016-11-17. Verify at npiregistry.cms.hhs.gov.

Where is St. Catherine of Siena Medical Center located?

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

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-11-17.