Nassau Immed Med Care PLLC
NPI 1255429254 · Internal Medicine Physician · Williston Park, NY
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nassau Immed Med Care PLLC is a Internal Medicine Physician organization in Williston Park, NY (NPI 1255429254).
Provider details
- NPI number
- 1255429254
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Susan Welgrin, Member(516) 294-3535
- License
- 187440 (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
- 2006-10-11
- Last updated
- 2008-03-17
Frequently asked questions
- What is Nassau Immed Med Care PLLC's NPI number?
- Nassau Immed Med Care PLLC's National Provider Identifier (NPI) is 1255429254, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Nassau Immed Med Care PLLC?
- Nassau Immed Med Care PLLC is classified in the NPPES registry as Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Nassau Immed Med Care PLLC located?
- Nassau Immed Med Care PLLC's practice location on file with NPPES is 465 Willis Ave, Williston Park, NY 11596-1724.
- What is Nassau Immed Med Care PLLC's phone number?
- The practice phone number listed in the NPPES registry for Nassau Immed Med Care PLLC is (516) 294-3535.
- Does Nassau Immed Med Care PLLC accept Medicare?
- Nassau Immed Med Care PLLC is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Nassau Immed Med Care PLLC?
- The authorized official listed on Nassau Immed Med Care PLLC's NPPES record is Susan Welgrin, Member. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Nassau Immed Med Care PLLC's NPI active?
- Yes — Nassau Immed Med Care PLLC's NPI (1255429254) is active in the NPPES registry as of the last update on 2008-03-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.