Ellen Offermann, MD
NPI 1811911431 · Emergency Medicine Physician · San Carlos, CA
Ellen Offermann, MD is a Emergency Medicine Physician provider in San Carlos, CA (NPI 1811911431).
Provider details
- NPI number
- 1811911431
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A93660 (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
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
- 2006-07-27
- Last updated
- 2015-07-13
Frequently asked questions
- What is Ellen Offermann's NPI number?
- Ellen Offermann's National Provider Identifier (NPI) is 1811911431, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ellen Offermann's specialty?
- Ellen Offermann is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ellen Offermann located?
- Ellen Offermann's practice location on file with NPPES is 301 Industrial Rd, San Carlos, CA 94070-2603.
- What is Ellen Offermann's phone number?
- The practice phone number listed in the NPPES registry for Ellen Offermann is (650) 596-4260.
- Is Ellen Offermann's NPI active?
- Yes — Ellen Offermann's NPI (1811911431) is active in the NPPES registry as of the last update on 2015-07-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.