IndividualActive
Nancy O'Brien, RN
NPI 1255603676 · Registered Nurse · Phoenix, AZ
Nancy O'Brien, RN is a Registered Nurse provider in Phoenix, AZ (NPI 1255603676).
Provider details
- NPI number
- 1255603676
- Entity type
- Individual
- Primary specialty
- Registered NurseNursing Service Providers
- Credential
- RN
- Sex
- Female
- Sole proprietor
- No
- License
- RN166531 (AZ)
Specialties & taxonomies
Nursing Service Providers
Profile Score
Detailed profile(80/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 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
4212 N 16th St
Phoenix, AZ 85016-5319
Phone: (602) 263-1200
Fax: (602) 200-5383
Street-level locationGet directions
Mailing address
Po Box 31001-0698
Pasadena, CA 91110-0698
Registry dates
- Enumerated
- 2012-02-01
- Last updated
- 2012-02-01
Frequently asked questions
- What is Nancy O'Brien's NPI number?
- Nancy O'Brien's National Provider Identifier (NPI) is 1255603676, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nancy O'Brien's specialty?
- Nancy O'Brien is listed in the NPPES registry with a primary specialty of Registered Nurse (Nursing Service Providers).
- Where is Nancy O'Brien located?
- Nancy O'Brien's practice location on file with NPPES is 4212 N 16th St, Phoenix, AZ 85016-5319.
- What is Nancy O'Brien's phone number?
- The practice phone number listed in the NPPES registry for Nancy O'Brien is (602) 263-1200.
- Is Nancy O'Brien's NPI active?
- Yes — Nancy O'Brien's NPI (1255603676) is active in the NPPES registry as of the last update on 2012-02-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.