Mary O'Brien, CNM
NPI 1124177332 · Advanced Practice Midwife · Hermosa Beach, CA
Mary O'Brien, CNM is a Advanced Practice Midwife provider in Hermosa Beach, CA (NPI 1124177332).
Provider details
- NPI number
- 1124177332
- Entity type
- Individual
- Primary specialty
- Advanced Practice MidwifePhysician Assistants & Advanced Practice Nursing Providers
- Credential
- CNM
- Sex
- Female
- Sole proprietor
- Yes
- License
- NMW490 (CA)
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
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
- 2007-01-09
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mary O'Brien's NPI number?
- Mary O'Brien's National Provider Identifier (NPI) is 1124177332, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary O'Brien's specialty?
- Mary O'Brien is listed in the NPPES registry with a primary specialty of Advanced Practice Midwife (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mary O'Brien located?
- Mary O'Brien's practice location on file with NPPES is 1028 Loma Dr, Hermosa Beach, CA 90254-4244.
- What is Mary O'Brien's phone number?
- The practice phone number listed in the NPPES registry for Mary O'Brien is (310) 376-5647.
- Is Mary O'Brien's NPI active?
- Yes — Mary O'Brien's NPI (1124177332) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.