What is William Stewart's NPI number?

William Stewart's National Provider Identifier (NPI) is 1215941109, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is William Stewart's specialty?

William Stewart is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).

Where is William Stewart located?

William Stewart's practice location on file with NPPES is 2300 California St, San Francisco, CA 94115-2753.

What is William Stewart's phone number?

The practice phone number listed in the NPPES registry for William Stewart is (415) 923-3500.

Is William Stewart's NPI active?

Yes — William Stewart's NPI (1215941109) is active in the NPPES registry as of the last update on 2007-07-08.

IndividualActive

William Stewart, M.D.

NPI 1215941109 · Ophthalmology Physician · San Francisco, CA

William Stewart, M.D. is a Ophthalmology Physician provider in San Francisco, CA (NPI 1215941109).

Provider details

NPI number: 1215941109
Entity type: Individual
Primary specialty: Ophthalmology PhysicianAllopathic & Osteopathic Physicians
Credential: M.D.
Sex: Male
Sole proprietor: No
License: C32397 (CA)

Specialties & taxonomies

Ophthalmology PhysicianPrimary207W00000XLicense C32397 (CA)
Allopathic & Osteopathic Physicians

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
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

2300 California St

Ste 111

San Francisco, CA 94115-2753

Phone: (415) 923-3500

Street-level locationGet directions

More CA providers

Mailing address

Po Box 254947

Sacramento, CA 95865-4947

Enumerated: 2006-07-28
Last updated: 2007-07-08

Frequently asked questions

What is William Stewart's NPI number?: William Stewart's National Provider Identifier (NPI) is 1215941109, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is William Stewart's specialty?: William Stewart is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
Where is William Stewart located?: William Stewart's practice location on file with NPPES is 2300 California St, San Francisco, CA 94115-2753.
What is William Stewart's phone number?: The practice phone number listed in the NPPES registry for William Stewart is (415) 923-3500.
Is William Stewart's NPI active?: Yes — William Stewart's NPI (1215941109) is active in the NPPES registry as of the last update on 2007-07-08.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.