Theresa Maestas, MD
NPI 1043242373 · Emergency Medicine Physician · Fountain Valley, CA
Theresa Maestas, MD is a Emergency Medicine Physician provider in Fountain Valley, CA (NPI 1043242373).
Provider details
- NPI number
- 1043242373
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- G43392 (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
- 2006-07-07
- Last updated
- 2008-04-30
Frequently asked questions
- What is Theresa Maestas's NPI number?
- Theresa Maestas's National Provider Identifier (NPI) is 1043242373, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Theresa Maestas's specialty?
- Theresa Maestas is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Theresa Maestas located?
- Theresa Maestas's practice location on file with NPPES is 17100 Euclid St, Fountain Valley, CA 92708.
- What is Theresa Maestas's phone number?
- The practice phone number listed in the NPPES registry for Theresa Maestas is (714) 966-7200.
- Is Theresa Maestas's NPI active?
- Yes — Theresa Maestas's NPI (1043242373) is active in the NPPES registry as of the last update on 2008-04-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.