William D. Mosier, M.D.
NPI 1679818264 · Ophthalmology Physician · Fullerton, CA
William D. Mosier, M.D. is a Ophthalmology Physician organization in Fullerton, CA (NPI 1679818264).
Provider details
- NPI number
- 1679818264
- Entity type
- Organization
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- William Mosier, Owner/Physician(714) 871-2570
- License
- 10328T (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Eye and Vision Services Providers
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
13 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
Other names (DBA / former)
- Doing business as
- Mosier Eye Center Medical Group
Registry dates
- Enumerated
- 2012-12-07
- Last updated
- 2012-12-07
Frequently asked questions
- What is William D. Mosier, M.D.'s NPI number?
- William D. Mosier, M.D.'s National Provider Identifier (NPI) is 1679818264, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is William D. Mosier, M.D.?
- William D. Mosier, M.D. is classified in the NPPES registry as Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is William D. Mosier, M.D. located?
- William D. Mosier, M.D.'s practice location on file with NPPES is 265 Laguna Rd, Fullerton, CA 92835-2515.
- What is William D. Mosier, M.D.'s phone number?
- The practice phone number listed in the NPPES registry for William D. Mosier, M.D. is (714) 871-2570.
- Who is the authorized official for William D. Mosier, M.D.?
- The authorized official listed on William D. Mosier, M.D.'s NPPES record is William Mosier, Owner/Physician. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is William D. Mosier, M.D.'s NPI active?
- Yes — William D. Mosier, M.D.'s NPI (1679818264) is active in the NPPES registry as of the last update on 2012-12-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.