Josefina Arenas, M.D
NPI 1518926484 · Internal Medicine Physician · Fairfield, CA
Josefina Arenas, M.D is a Internal Medicine Physician provider in Fairfield, CA (NPI 1518926484).
Provider details
- NPI number
- 1518926484
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D
- Sex
- Female
- Sole proprietor
- Yes
- License
- A067406 (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
20 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
- 2006-03-20
- Last updated
- 2011-04-15
Frequently asked questions
- What is Josefina Arenas's NPI number?
- Josefina Arenas's National Provider Identifier (NPI) is 1518926484, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Josefina Arenas's specialty?
- Josefina Arenas is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Josefina Arenas located?
- Josefina Arenas's practice location on file with NPPES is 3700 Hilborn Rd, Fairfield, CA 94534-7946.
- What is Josefina Arenas's phone number?
- The practice phone number listed in the NPPES registry for Josefina Arenas is (707) 422-0900.
- Is Josefina Arenas's NPI active?
- Yes — Josefina Arenas's NPI (1518926484) is active in the NPPES registry as of the last update on 2011-04-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.