Thomas Williams M.D.
About this NPIWhat this record shows.
NPI 1619004967 is registered to Thomas Williams M.D., a Pulmonary Disease Physician practising at 642 Mandana Blvd in Oakland, California. Pulmonary Disease Physician is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy. Thomas Williams M.D. has been enumerated in the National Provider Identifier (NPI) registry since 2007.
Secondary identifiers
Additional identifiers this provider has registered with NPPES. Used by medical billers, credentialers, and insurance verifiers to cross-reference claims and enrollments.
Medicaid
Source: NPPES public registry.
Medicare enrollment
This provider holds a Medicare enrollment on file with the Provider Enrollment, Chain and Ownership System (PECOS). Each enrollment carries a public Medicare Enrollment ID (ENRLMT_ID) used by billers and intermediaries.
Practitioner
- I20071221000313Pulmonary DiseaseCA
Source: CMS PECOS public enrollment file.
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 Thomas Williams M.D. accepts. To confirm in-network status with your specific health plan, contact Thomas Williams M.D. directly at (510) 504-1226.
Frequently asked
Yes. NPI 1619004967 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Pulmonary Disease Physician 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 (510) 504-1226.
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. Thomas Williams M.D. is a Type-1 individual NPI.