Karen O'Brien, ANP
NPI 1265872048 · Adult Health Nurse Practitioner · Roslyn, NY
Karen O'Brien, ANP is a Adult Health Nurse Practitioner provider in Roslyn, NY (NPI 1265872048).
Provider details
- NPI number
- 1265872048
- Entity type
- Individual
- Primary specialty
- Adult Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- ANP
- Sex
- Female
- Sole proprietor
- Yes
- License
- F305840 (NY)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
12 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
- 2013-06-26
- Last updated
- 2013-06-26
Frequently asked questions
- What is Karen O'Brien's NPI number?
- Karen O'Brien's National Provider Identifier (NPI) is 1265872048, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen O'Brien's specialty?
- Karen O'Brien is listed in the NPPES registry with a primary specialty of Adult Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Karen O'Brien located?
- Karen O'Brien's practice location on file with NPPES is 100 Port Washington Blvd, Roslyn, NY 11576-1347.
- What is Karen O'Brien's phone number?
- The practice phone number listed in the NPPES registry for Karen O'Brien is (516) 562-6000.
- Is Karen O'Brien's NPI active?
- Yes — Karen O'Brien's NPI (1265872048) is active in the NPPES registry as of the last update on 2013-06-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.