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William Prothero, O.D.
NPI 1144223405 · Optometrist · Bellevue, WA
William Prothero, O.D. is a Optometrist provider in Bellevue, WA (NPI 1144223405).
Provider details
- NPI number
- 1144223405
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- O.D.
- Sex
- Male
- Sole proprietor
- No
- License
- OD00001765 (WA)
Specialties & taxonomies
Eye and Vision Services Providers
Eye and Vision Services Providers
Profile Score
Detailed profile(91/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
21 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
1837 156th Ave Ne
Ste 201
Bellevue, WA 98007-4387
Phone: (425) 643-2020
Fax: (425) 643-0859
Street-level locationGet directions
Mailing address
1837 156th Ave Ne
Bellevue, WA 98007-4387
Registry dates
- Enumerated
- 2005-05-31
- Last updated
- 2023-03-07
Frequently asked questions
- What is William Prothero's NPI number?
- William Prothero's National Provider Identifier (NPI) is 1144223405, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Prothero's specialty?
- William Prothero is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is William Prothero located?
- William Prothero's practice location on file with NPPES is 1837 156th Ave Ne, Bellevue, WA 98007-4387.
- What is William Prothero's phone number?
- The practice phone number listed in the NPPES registry for William Prothero is (425) 643-2020.
- Is William Prothero's NPI active?
- Yes — William Prothero's NPI (1144223405) is active in the NPPES registry as of the last update on 2023-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.