Diane Williams OD
About this NPIWhat this record shows.
NPI 1790746238 is registered to Diane Williams OD, a Optometrist practising at 909 San Ramon Valley Blvd, Suite 114 in Danville, California. Optometrist is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy. Diane Williams OD has been enumerated in the National Provider Identifier (NPI) registry since 2006.
Your brand here.
Insurance & acceptsHow to confirm coverage.
The National Plan and Provider Enumeration System (NPPES) registry does not include commercial insurance network data, so we cannot show which plans Diane Williams OD accepts. To confirm in-network status with your specific health plan, contact Diane Williams OD directly at (925) 837-5922.
Frequently asked
Yes. NPI 1790746238 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 (925) 837-5922.
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. Diane Williams OD is a Type-1 individual NPI.