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About this NPIWhat this record shows.
NPI 1891842548 is registered to Clark Welsh O.D., a Optometrist practising at 1635 Divisadero St Ste 400 in San Francisco, California. Optometrist is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy. Clark Welsh O.D. has been enumerated in the National Provider Identifier (NPI) registry since 2007.
Provider type
Individual (Type 1)
Status
Active
Enumerated
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The National Plan and Provider Enumeration System (NPPES) registry does not include commercial insurance network data, so we cannot show which plans Clark Welsh O.D. accepts. To confirm in-network status with your specific health plan, contact Clark Welsh O.D. directly at (415) 833-2020.
Frequently asked
Yes. NPI 1891842548 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Optometrist is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy.
The CMS NPPES Public Registry at npiregistry.cms.hhs.gov is the authoritative source. FindMyNPI mirrors this dataset and refreshes monthly. For real-time verification, you can also call the provider's office at (415) 833-2020.
An individual healthcare provider has a single Type-1 NPI for life. Organisations can hold separate Type-2 NPIs per location, specialty, or sub-entity. Clark Welsh O.D. is a Type-1 individual NPI.
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