IndividualActive
Ricardo Diaz, MD
NPI 1104975473 · Anesthesiology Physician · Fontana, CA
Ricardo Diaz, MD is a Anesthesiology Physician provider in Fontana, CA (NPI 1104975473).
Provider details
- NPI number
- 1104975473
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A46177 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(90/100 index)
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
9961 Sierra Ave
Fontana, CA 92335-6720
Phone: (909) 427-3910
Street-level locationGet directions
Mailing address
9961 Sierra Ave
Fontana, CA 92335-6720
Registry dates
- Enumerated
- 2007-01-09
- Last updated
- 2008-09-23
Frequently asked questions
- What is Ricardo Diaz's NPI number?
- Ricardo Diaz's National Provider Identifier (NPI) is 1104975473, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ricardo Diaz's specialty?
- Ricardo Diaz is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Ricardo Diaz located?
- Ricardo Diaz's practice location on file with NPPES is 9961 Sierra Ave, Fontana, CA 92335-6720.
- What is Ricardo Diaz's phone number?
- The practice phone number listed in the NPPES registry for Ricardo Diaz is (909) 427-3910.
- Is Ricardo Diaz's NPI active?
- Yes — Ricardo Diaz's NPI (1104975473) is active in the NPPES registry as of the last update on 2008-09-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.