CLARK T WELSH O.D.
NPI 1891842548
Optometrist in San Francisco, CA

Q: What is Clark Welsh's NPI number?

The NPI number for Clark Welsh is 1891842548. It was assigned to this individual provider in the NPPES registry on January 4, 2007.

Q: What is Clark Welsh's specialty?

The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.

Q: When was this NPI record last updated?

The NPPES record for Clark Welsh was last updated on January 28, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since January 04, 2007

1635 DIVISADERO ST STE 400, SAN FRANCISCO, CA 94115(415) 833-2020(415) 833-2609 Get Directions Write a Review

NPPES record last updated: January 28, 2022. Verified against the NPPES registry weekly; last sync: August 30, 2026.

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About Clark T Welsh O.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

CLARK T WELSH O.D. (NPI 1891842548) is an individual optometrist in San Francisco, California, licensed in California (9121) and active in the NPI registry since January 2007.

NPPES Registry Identity

NPI1891842548

Entity TypeIndividualMale

Primary Taxonomy152W00000X

Provider Legal NameCLARK T WELSHCredential: O.D.

Location Address1635 DIVISADERO ST STE 400San Francisco, CA 94115-3043

Mailing Address1635 Divisadero St Ste 400San Francisco, CA 94115-3043 · (415) 833-2020 · Fax (415) 833-2609

Phone(415) 833-2020

Fax(415) 833-2609

Sole ProprietorNo

Enumeration DateJanuary 4, 2007

Last NPPES UpdateJanuary 28, 2022

NPPES CertifiedJanuary 28, 2022

✔ NPI 1891842548 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOptometristEye and Vision Services Providers

Taxonomy Code152W00000X

License✔ Licensed in CA · 9121

Definition

Doctors of optometry (ODs) are the primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injuries, and disorders of the visual system, the eye, and associated structures as well as identify related systemic conditions affecting the eye. An optometrist has completed pre-professional undergraduate education in a college or university and four years of professional education at a college of optometry, leading to the doctor of optometry (O.D.) degree. Some optometrists complete an optional residency in a specific area of practice. Optometrists are eye health care professionals state-licensed to diagnose and treat diseases and disorders of the eye and visual system.

1635 DIVISADERO ST STE 400, San Francisco, CA 94115

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Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Clark Welsh's NPI number?

The NPI number for Clark Welsh is 1891842548. It was assigned to this individual provider in the NPPES registry on January 4, 2007.

Where is Clark Welsh located?

Clark Welsh practices at 1635 Divisadero St Ste 400, San Francisco, CA 94115. The listed phone number is (415) 833-2020.

What is Clark Welsh's specialty?

The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.

When was this NPI record last updated?

The NPPES record for Clark Welsh was last updated on January 28, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.