GREGORY S NISHIMURA M.D.
NPI 1881744795
Surgery in Hewlett, NY
About Gregory S Nishimura M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GREGORY S NISHIMURA M.D. (NPI 1881744795) is an individual surgery provider in Hewlett, New York, licensed in New York (217807) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS and is a graduate of Other (1994).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Gregory S Nishimura M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
5Medicare enrollment records show Gregory Nishimura reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Hewlett, NY 11557
- Reassigned Medicare billing, New York enrollment
- 944 clinicians in this Medicare group
Rockville Centre, NY 11571
- Reassigned Medicare billing, New York enrollment
- 266 clinicians in this Medicare group
Roslyn Heights, NY 11577
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: Long Island Minimally Invasive Surgery PC
- 37 clinicians in this Medicare group
Port Jefferson, NY 11777
- Reassigned Medicare billing, New York enrollment
- 210 clinicians in this Medicare group
Santa Cruz, CA 95060
- Reassigned Medicare billing, California enrollment
- 10 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 11557 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 9
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Gregory Nishimura's NPI number?
The NPI number for Gregory Nishimura is 1881744795. It was assigned to this individual provider in the NPPES registry on January 11, 2007.
Where is Gregory Nishimura located?
Gregory Nishimura practices at 1420 Broadway, Hewlett, NY 11557. The listed phone number is (516) 374-8631.
What is Gregory Nishimura's specialty?
The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.
Is Gregory Nishimura enrolled in Medicare?
Yes. Gregory Nishimura is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Gregory Nishimura's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Nishimura reassigns Medicare benefits to 5 organizations: Chs Physician Partners, PC (Hewlett, NY), Mercy Medical Center (Rockville Centre, NY), Long Island Minimally Invasive Surgery, P.C. (Roslyn Heights, NY), St. Charles Hospital Corp. (Port Jefferson, NY) and Medxcare Health Professionals (Santa Cruz, CA). Each 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 Gregory Nishimura's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Gregory Nishimura was last updated on July 9, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.
# Gregory S Nishimura, M.D. · NPI 1881744795
Surgery physician in Hewlett, New York. Individual provider, active in the CMS NPPES registry since January 11, 2007.
## Identity
- **NPI:** 1881744795 (Entity type: Individual)
- **Enumerated:** January 11, 2007
- **Primary specialty:** Surgery · taxonomy 208600000X
- **State license:** 217807 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 1420 BROADWAY, Hewlett, NY 11557-1352
- **Phone:** (516) 374-8631
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Chs Physician Partners, PC (NPI 1710222096, Hewlett, NY); Mercy Medical Center (NPI 1487698544, Rockville Centre, NY); Long Island Minimally Invasive Surgery, P.C. (NPI 1356545867, Roslyn Heights, NY); St. Charles Hospital Corp. (NPI 1497765630, Port Jefferson, NY); Medxcare Health Professionals (NPI 1982177150, Santa Cruz, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1994
## Record status
- **NPPES last updated:** July 9, 2007
- **Other identifiers:** Medicare UPIN H27227 (NY); Medicare ID-Type Unspecified 5C2811 (NY); Medicaid 02153051 (NY)
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Source: [NPI Profile](https://npiprofile.com/npi/1881744795) · Data from the CMS NPPES public registry.