William Fields, M.D
NPI 1699703801 · Emergency Medicine Physician · Laguna Hills, CA
William Fields, M.D is a Emergency Medicine Physician provider in Laguna Hills, CA (NPI 1699703801).
Provider details
- NPI number
- 1699703801
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D
- Sex
- Male
- Sole proprietor
- No
- License
- G45043 (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
- 2006-06-28
- Last updated
- 2008-03-10
Frequently asked questions
- What is William Fields's NPI number?
- William Fields's National Provider Identifier (NPI) is 1699703801, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Fields's specialty?
- William Fields is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Fields located?
- William Fields's practice location on file with NPPES is 24451 Health Center Dr, Laguna Hills, CA 92653-3689.
- What is William Fields's phone number?
- The practice phone number listed in the NPPES registry for William Fields is (714) 837-4500.
- Is William Fields's NPI active?
- Yes — William Fields's NPI (1699703801) is active in the NPPES registry as of the last update on 2008-03-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.