Steven Simonsen, MD
NPI 1457459133 · Orthopaedic Surgery Physician · West Islip, NY
Enrolled with Medicare as Practitioner - Orthopedic Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Steven Simonsen, MD is a Orthopaedic Surgery Physician provider in West Islip, NY (NPI 1457459133).
Provider details
- NPI number
- 1457459133
- Entity type
- Individual
- Primary specialty
- Orthopaedic Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 146175 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-20
- Last updated
- 2008-04-11
Frequently asked questions
- What is Steven Simonsen's NPI number?
- Steven Simonsen's National Provider Identifier (NPI) is 1457459133, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Steven Simonsen's specialty?
- Steven Simonsen is listed in the NPPES registry with a primary specialty of Orthopaedic Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Steven Simonsen located?
- Steven Simonsen's practice location on file with NPPES is 340 Montauk Hwy, West Islip, NY 11795-4437.
- What is Steven Simonsen's phone number?
- The practice phone number listed in the NPPES registry for Steven Simonsen is (631) 422-9530.
- Does Steven Simonsen accept Medicare?
- Steven Simonsen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Steven Simonsen's NPI active?
- Yes — Steven Simonsen's NPI (1457459133) is active in the NPPES registry as of the last update on 2008-04-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.