What is Clark Welsh's NPI number?

Clark Welsh's National Provider Identifier (NPI) is 1891842548, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Clark Welsh's specialty?

Clark Welsh is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).

Where is Clark Welsh located?

Clark Welsh's practice location on file with NPPES is 1635 Divisadero St Ste 400, San Francisco, CA 94115-3043.

What is Clark Welsh's phone number?

The practice phone number listed in the NPPES registry for Clark Welsh is (415) 833-2020.

Is Clark Welsh's NPI active?

Yes — Clark Welsh's NPI (1891842548) is active in the NPPES registry as of the last update on 2022-01-28.

IndividualActive

Clark Welsh, O.D.

NPI 1891842548 · Optometrist · San Francisco, CA

Clark Welsh, O.D. is a Optometrist provider in San Francisco, CA (NPI 1891842548).

Provider details

NPI number: 1891842548
Entity type: Individual
Primary specialty: OptometristEye and Vision Services Providers
Credential: O.D.
Sex: Male
Sole proprietor: No
License: 9121 (CA)

Specialties & taxonomies

OptometristPrimary152W00000XLicense 9121 (CA)
Eye and Vision Services Providers

Profile Score

Detailed profile(90/100 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

1635 Divisadero St Ste 400

San Francisco, CA 94115-3043

Phone: (415) 833-2020

Fax: (415) 833-2609

Street-level locationGet directions

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Mailing address