ST. CATHERINE OF SIENA MEDICAL CENTER
NPI 1154764819
General Acute Care Hospital in Smithtown, NY
About St. Catherine Of Siena Medical Center NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ST. CATHERINE OF SIENA MEDICAL CENTER (NPI 1154764819) is a healthcare organization registered as a general acute care hospital in Smithtown, New York and active in the NPI registry since April 2013. The organization lists Lori Hummel, Director, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
St. Catherine Of Siena Medical Center is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
194Medicare enrollment records show 194 clinicians reassign Medicare billing to St. Catherine Of Siena Medical Center, which bills Medicare for the services they deliver. Of these, 2 practice at this address and 12 within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 9
Nearest to this location (20)
See all 194Stony Brook, NY 11790
Stony Brook, NY 11794
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is St. Catherine Of Siena Medical Center's NPI number?
The NPI number for St. Catherine Of Siena Medical Center is 1154764819. It was assigned to this organization in the NPPES registry on April 12, 2013.
Where is St. Catherine Of Siena Medical Center located?
St. Catherine Of Siena Medical Center is located at 50 Route 25A, Smithtown, NY 11787. The listed phone number is (631) 862-3000.
What is St. Catherine Of Siena Medical Center's specialty?
The primary specialty registered for this NPI is General Acute Care Hospital with taxonomy code 282N00000X.
Is St. Catherine Of Siena Medical Center enrolled in Medicare?
Yes. St. Catherine Of Siena Medical Center is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through St. Catherine Of Siena Medical Center?
According to the CMS Revalidation Reassignment List (October 2026 release), 194 clinicians in 9 Medicare specialties reassign their Medicare billing to St. Catherine Of Siena Medical Center. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. The largest specialties are Neurology (137), Psychiatry (33) and Nurse Practitioner (8). Of these, 2 practice at this address and 12 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for St. Catherine Of Siena Medical Center was last updated on April 12, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# St. Catherine Of Siena Medical Center · NPI 1154764819
General Acute Care Hospital organization in Smithtown, New York. Organization record, active in the CMS NPPES registry since April 12, 2013.
## Identity
- **NPI:** 1154764819 (Entity type: Organization)
- **Enumerated:** April 12, 2013
- **Primary specialty:** General Acute Care Hospital · taxonomy 282N00000X
- **Organization subpart:** No
- **Authorized official:** Lori Hummel, DIRECTOR
## Practice location
- **Address:** 50 ROUTE 25A, Smithtown, NY 11787-1348
- **Phone:** (631) 862-3000
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 194 clinicians in 9 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Neurology (137), Psychiatry (33), Nurse Practitioner (8); 2 practice at this address and 12 within 10 miles; [full list](https://npiprofile.com/npi/1154764819/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 12, 2013
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Source: [NPI Profile](https://npiprofile.com/npi/1154764819) · Data from the CMS NPPES public registry.