William Pappas, OPTOMETRIST
NPI 1871650135 · Optometrist · Vallejo, CA
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Pappas, OPTOMETRIST is a Optometrist provider in Vallejo, CA (NPI 1871650135).
Provider details
- NPI number
- 1871650135
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- OPTOMETRIST
- Sex
- Male
- Sole proprietor
- No
- License
- T 9065 (CA)
Specialties & taxonomies
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
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
- 2007-01-03
- Last updated
- 2022-01-03
Frequently asked questions
- What is William Pappas's NPI number?
- William Pappas's National Provider Identifier (NPI) is 1871650135, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Pappas's specialty?
- William Pappas is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is William Pappas located?
- William Pappas's practice location on file with NPPES is 975 Sereno Dr, Vallejo, CA 94589-2441.
- What is William Pappas's phone number?
- The practice phone number listed in the NPPES registry for William Pappas is (707) 651-2996.
- Does William Pappas accept Medicare?
- William Pappas is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Pappas's NPI active?
- Yes — William Pappas's NPI (1871650135) is active in the NPPES registry as of the last update on 2022-01-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.