William Joseph M.D.
About this NPIWhat this record shows.
NPI 1356423255 is registered to William Joseph M.D., a Infectious Disease practising at 5601 Norris Canyon Rd, Suite #220 in San Ramon, California. Infectious Disease is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy. William Joseph M.D. 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 William Joseph M.D. accepts. To confirm in-network status with your specific health plan, contact William Joseph M.D. directly at (925) 277-2050.
Frequently asked
Yes. NPI 1356423255 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Infectious Disease 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) 277-2050.
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. William Joseph M.D. is a Type-1 individual NPI.