Joseph Villarreal, M.D.
NPI 1003229436 · Emergency Medicine Physician · Orange, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joseph Villarreal, M.D. is a Emergency Medicine Physician provider in Orange, CA (NPI 1003229436).
Provider details
- NPI number
- 1003229436
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A141108 (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
12 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
- 2014-06-03
- Last updated
- 2021-12-06
Frequently asked questions
- What is Joseph Villarreal's NPI number?
- Joseph Villarreal's National Provider Identifier (NPI) is 1003229436, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joseph Villarreal's specialty?
- Joseph Villarreal is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Joseph Villarreal located?
- Joseph Villarreal's practice location on file with NPPES is 101 the City Dr S, Orange, CA 92868-3201.
- What is Joseph Villarreal's phone number?
- The practice phone number listed in the NPPES registry for Joseph Villarreal is (714) 456-5239.
- Does Joseph Villarreal accept Medicare?
- Joseph Villarreal is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joseph Villarreal's NPI active?
- Yes — Joseph Villarreal's NPI (1003229436) is active in the NPPES registry as of the last update on 2021-12-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.