LONG ISLAND GASTROENTEROLOGY AND LIVER DISEASE P.C.
NPI 1194025973
Internal Medicine in Smithtown, NY
About Long Island Gastroenterology And Liver Disease P.c. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
LONG ISLAND GASTROENTEROLOGY AND LIVER DISEASE P.C. (NPI 1194025973) is a healthcare organization registered as an internal medicine in Smithtown, New York and active in the NPI registry since October 2010. The organization lists Zvi Alpern, President, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment, revalidation and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Long Island Gastroenterology And Liver Disease P.c. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Revalidation Due Date
Revalidation due by November 30, 2026
Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to Long Island Gastroenterology And Liver Disease P.C., which bills Medicare for the services this clinician delivers.
Clinician (1)
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 Long Island Gastroenterology And Liver Disease P.C.'s NPI number?
The NPI number for Long Island Gastroenterology And Liver Disease P.C. is 1194025973. It was assigned to this organization in the NPPES registry on October 27, 2010.
Where is Long Island Gastroenterology And Liver Disease P.C. located?
Long Island Gastroenterology And Liver Disease P.C. is located at 48 Route 25A Ste 307, Smithtown, NY 11787. The listed phone number is (631) 265-0062.
What is Long Island Gastroenterology And Liver Disease P.C.'s specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Long Island Gastroenterology And Liver Disease P.C. enrolled in Medicare?
Yes. Long Island Gastroenterology And Liver Disease P.C. is registered in the Medicare PECOS enrollment system.
When is Long Island Gastroenterology And Liver Disease P.C.'s Medicare revalidation due?
According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (New York, Clinic/Group Practice) is due for revalidation by November 30, 2026. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.
How many clinicians bill Medicare through Long Island Gastroenterology And Liver Disease P.C.?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Gastroenterology) reassigns their Medicare billing to Long Island Gastroenterology And Liver Disease P.C.. 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Long Island Gastroenterology And Liver Disease P.C. was last updated on November 23, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.
# Long Island Gastroenterology And Liver Disease P.c. · NPI 1194025973
Internal Medicine organization in Smithtown, New York. Organization record, active in the CMS NPPES registry since October 27, 2010.
## Identity
- **NPI:** 1194025973 (Entity type: Organization)
- **Enumerated:** October 27, 2010
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **Organization subpart:** No
- **Authorized official:** Zvi Alpern, PRESIDENT
## Practice location
- **Address:** 48 ROUTE 25A STE 307, Smithtown, NY 11787-1454
- **Phone:** (631) 265-0062 · **Fax:** (631) 265-0590
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Medicare revalidation due:** November 30, 2026 (Non-DME Part B, New York, Clinic/Group Practice) · CMS Revalidation Due Date List, October 2026 release
- **Clinicians billing through this organization:** 1 clinician (Gastroenterology) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** November 23, 2010
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Source: [NPI Profile](https://npiprofile.com/npi/1194025973) · Data from the CMS NPPES public registry.