STEVEN SIMONSEN MD
NPI 1457459133
Orthopaedic Surgery in West Islip, NY
About Steven Simonsen Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
STEVEN SIMONSEN MD (NPI 1457459133) is an individual orthopaedic surgery provider in West Islip, New York, licensed in New York (146175) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Steven Simonsen Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Steven Simonsen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
West Islip, NY 11795
- Reassigned Medicare billing, New York enrollment
- 2 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 11795 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 10
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 Steven Simonsen's NPI number?
The NPI number for Steven Simonsen is 1457459133. It was assigned to this individual provider in the NPPES registry on September 20, 2006.
Where is Steven Simonsen located?
Steven Simonsen practices at 340 Montauk Hwy, West Islip, NY 11795. The listed phone number is (631) 422-9530.
What is Steven Simonsen's specialty?
The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.
Is Steven Simonsen enrolled in Medicare?
Yes. Steven Simonsen is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Steven Simonsen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Steven Simonsen reassigns Medicare benefits to South Shore Orthopaedic Associates (West Islip, NY). The 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 Steven Simonsen'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 Steven Simonsen was last updated on April 11, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# Steven Simonsen, MD · NPI 1457459133
Orthopaedic Surgery physician in West Islip, New York. Individual provider, active in the CMS NPPES registry since September 20, 2006.
## Identity
- **NPI:** 1457459133 (Entity type: Individual)
- **Enumerated:** September 20, 2006
- **Primary specialty:** Orthopaedic Surgery · taxonomy 207X00000X
- **State license:** 146175 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 340 MONTAUK HWY, West Islip, NY 11795-4437
- **Phone:** (631) 422-9530
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** South Shore Orthopaedic Associates (NPI 1134227820, West Islip, NY), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 11, 2008
- **Other identifiers:** Medicare PIN 53A191 (NY); Other 200000874 (NY)
---
Source: [NPI Profile](https://npiprofile.com/npi/1457459133) · Data from the CMS NPPES public registry.