OrganizationActive
Nassau Emergency Medicine, P.C.
NPI 1164579942 · Emergency Medicine Physician · Roslyn, NY
Provider details
- NPI number
- 1164579942
- Entity type
- Organization
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Mark Hoornstra, President & Chief Executive Officer(516) 562-6605
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(90/100 index)
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
100 Port Washington Blvd
Dept. of Emergency Medicine
Roslyn, NY 11576-1353
Phone: (516) 629-2454
Fax: (516) 629-2027
Street-level locationGet directions
Mailing address
Po Box 1470
Port Washington, NY 11050-7470
Registry dates
- Enumerated
- 2007-01-04
- Last updated
- 2009-02-02
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.