Mary O'Callaghan, M.D.
NPI 1932489408 · Family Medicine Physician · El Segundo, CA
Mary O'Callaghan, M.D. is a Family Medicine Physician provider in El Segundo, CA (NPI 1932489408).
Provider details
- NPI number
- 1932489408
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- AFE19605 (CA)
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
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
Mailing address
Registry dates
- Enumerated
- 2011-08-27
- Last updated
- 2011-08-27
Frequently asked questions
- What is Mary O'Callaghan's NPI number?
- Mary O'Callaghan's National Provider Identifier (NPI) is 1932489408, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary O'Callaghan's specialty?
- Mary O'Callaghan is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mary O'Callaghan located?
- Mary O'Callaghan's practice location on file with NPPES is 845 Maryland St, El Segundo, CA 90245-2546.
- What is Mary O'Callaghan's phone number?
- The practice phone number listed in the NPPES registry for Mary O'Callaghan is (310) 640-9604.
- Is Mary O'Callaghan's NPI active?
- Yes — Mary O'Callaghan's NPI (1932489408) is active in the NPPES registry as of the last update on 2011-08-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.