IndividualActive
Margaret Brennan, RN
NPI 1154627636 · Registered Nurse · Berkeley, CA
Margaret Brennan, RN is a Registered Nurse provider in Berkeley, CA (NPI 1154627636).
Provider details
- NPI number
- 1154627636
- Entity type
- Individual
- Primary specialty
- Registered NurseNursing Service Providers
- Credential
- RN
- Sex
- Female
- Sole proprietor
- Yes
- License
- 130467 (CA)
Specialties & taxonomies
Nursing Service Providers
Profile Score
Detailed profile(82/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
15 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
2222 Bancroft Way
Berkeley, CA 94720-4300
Phone: (510) 643-8148
Street-level locationGet directions
Mailing address
28 Ardor Dr
Orinda, CA 94563-4028
Registry dates
- Enumerated
- 2011-02-01
- Last updated
- 2011-02-01
Frequently asked questions
- What is Margaret Brennan's NPI number?
- Margaret Brennan's National Provider Identifier (NPI) is 1154627636, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Brennan's specialty?
- Margaret Brennan is listed in the NPPES registry with a primary specialty of Registered Nurse (Nursing Service Providers).
- Where is Margaret Brennan located?
- Margaret Brennan's practice location on file with NPPES is 2222 Bancroft Way, Berkeley, CA 94720-4300.
- What is Margaret Brennan's phone number?
- The practice phone number listed in the NPPES registry for Margaret Brennan is (510) 643-8148.
- Is Margaret Brennan's NPI active?
- Yes — Margaret Brennan's NPI (1154627636) is active in the NPPES registry as of the last update on 2011-02-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.