MR. GUS KATSIGIORGIS DO
NPI 1033105564
Orthopaedic Surgery in Hewlett, NY
About Mr. Gus Katsigiorgis Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MR. GUS KATSIGIORGIS DO (NPI 1033105564) is an individual orthopaedic surgery provider in Hewlett, New York, licensed in New York (234244) and active in the NPI registry since September 2005. He is enrolled in Medicare PECOS, is affiliated with Mercy Medical Center, and is a graduate of New York College Of Osteo Medicine Of New York Institute Of Technology (2000).
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 (PECOS)
Mr. Gus Katsigiorgis Do is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Gus Katsigiorgis reassigns Medicare billing to 2 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
- 33 clinicians in this Medicare group
Hempstead, NY 11550
- Reassigned Medicare billing, New York enrollment
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 20
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mercy Medical Center
Acute Care Hospitals · Rockville Centre, NYPhysician 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.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 12
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
HEWLETT, NY 11557
HEWLETT, NY 11557
HEWLETT, NY 11557
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 Gus Katsigiorgis's NPI number?
The NPI number for Gus Katsigiorgis is 1033105564. It was assigned to this individual provider in the NPPES registry on September 20, 2005.
Where is Gus Katsigiorgis located?
Gus Katsigiorgis practices at 1512 Broadway, Hewlett, NY 11557. The listed phone number is (516) 374-6838.
What is Gus Katsigiorgis's specialty?
The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.
Is Gus Katsigiorgis enrolled in Medicare?
Yes. Gus Katsigiorgis is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Gus Katsigiorgis's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gus Katsigiorgis reassigns Medicare benefits to 2 organizations: Island Musculoskeletal Care MD PC (Hewlett, NY) and Professional Orthopedic Surgery PLLC (Hempstead, NY). 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 Gus Katsigiorgis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Gus Katsigiorgis affiliated with any hospitals?
According to CMS data, Gus Katsigiorgis is affiliated with Mercy Medical Center.
When was this NPI record last updated?
The NPPES record for Gus Katsigiorgis was last updated on January 8, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.