MIKHAIL GRZHIBEK, M.D., P.C.
NPI 1831444819
Clinic/Center - Primary Care in East Patchogue, NY
About Mikhail Grzhibek, M.d., P.c. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MIKHAIL GRZHIBEK, M.D., P.C. (NPI 1831444819) is a healthcare organization registered as a primary care in East Patchogue, New York and active in the NPI registry since July 2012. The organization lists Mikhail Grzhibek, President, 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)
Mikhail Grzhibek, M.d., P.c. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to Mikhail Grzhibek, M.D., 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 Mikhail Grzhibek, M.D., P.C.'s NPI number?
The NPI number for Mikhail Grzhibek, M.D., P.C. is 1831444819. It was assigned to this organization in the NPPES registry on July 17, 2012.
Where is Mikhail Grzhibek, M.D., P.C. located?
Mikhail Grzhibek, M.D., P.C. is located at 285 Sills Rd Bldg 4 Suite D, East Patchogue, NY 11772. The listed phone number is (631) 654-1800.
What is Mikhail Grzhibek, M.D., P.C.'s specialty?
The primary specialty registered for this NPI is Clinic/Center, specializing in Primary Care, with taxonomy code 261QP2300X.
Is Mikhail Grzhibek, M.D., P.C. enrolled in Medicare?
Yes. Mikhail Grzhibek, M.D., P.C. is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Mikhail Grzhibek, M.D., P.C.?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Mikhail Grzhibek, M.D., 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 Mikhail Grzhibek, M.D., P.C. was last updated on July 17, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.
# Mikhail Grzhibek, M.d., P.c. · NPI 1831444819
Primary Care organization in East Patchogue, New York. Organization record, active in the CMS NPPES registry since July 17, 2012.
## Identity
- **NPI:** 1831444819 (Entity type: Organization)
- **Enumerated:** July 17, 2012
- **Primary specialty:** Clinic/Center - Primary Care · taxonomy 261QP2300X
- **Organization subpart:** No
- **Authorized official:** Mikhail Grzhibek, PRESIDENT
## Practice location
- **Address:** 285 SILLS RD BLDG 4, SUITE D, East Patchogue, NY 11772-4869
- **Phone:** (631) 654-1800 · **Fax:** (631) 240-9181
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 1 clinician (Internal Medicine) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 17, 2012
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Source: [NPI Profile](https://npiprofile.com/npi/1831444819) · Data from the CMS NPPES public registry.