William Duan MD
About this NPIWhat this record shows.
NPI 1881334308 is registered to William Duan MD, a Psychiatric Hospital Unit practising at 1800 N California St in Stockton, California. Psychiatric Hospital Unit is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy. William Duan MD has been enumerated in the National Provider Identifier (NPI) registry since 2022.
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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 Duan MD accepts. To confirm in-network status with your specific health plan, contact William Duan MD directly at (209) 547-5716.
Frequently asked
Yes. NPI 1881334308 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Psychiatric Hospital Unit 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 (209) 547-5716.
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 Duan MD is a Type-1 individual NPI.