Dr. Bruce Dreyfuss M.D.
About this NPIWhat this record shows.
NPI 1558366047 is registered to Dr. Bruce Dreyfuss M.D., a Rheumatology Physician practising at 25 N 14th St, Ste 890 in San Jose, California. Rheumatology Physician is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy. Dr. Bruce Dreyfuss M.D. has been enumerated in the National Provider Identifier (NPI) registry since 2005.
Beyond the registryWhat this record adds.
This record carries 4 secondary identifiers beyond the base NPI: Medicaid and other payer cross-references used by billers and credentialers, which the standard CMS NPPES lookup does not surface. It is enrolled in Medicare, linking to 1 PECOS enrollment record (with a public Medicare Enrollment ID) sourced from CMS, which the NPPES registry does not list. Within the directory it is one of 1,143 Rheumatology Physician providers on file in California.
Source: CMS NPPES and PECOS public files. snapshot, refreshed monthly.
Your brand here.
Secondary identifiers
Additional identifiers this provider has registered with NPPES. Used by medical billers, credentialers, and insurance verifiers to cross-reference claims and enrollments.
Other
- 660003967CA· Issued by RAILROAD MEDICARE
- ZZZ54863ZCA· Issued by BLUE SHIELD #
- 110048492CA· Issued by RAILROAD MEDICARE
Medicaid
- 5148629CA
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
- I20120417000222RheumatologyCA
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 Dr. Bruce Dreyfuss M.D. accepts. To confirm in-network status with your specific health plan, contact Dr. Bruce Dreyfuss M.D. directly at (408) 288-6623.
Frequently asked
Yes. NPI 1558366047 is registered as Active in the CMS NPPES public registry and passes the Luhn check-digit validation that all 10-digit NPIs use.
Rheumatology 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 (408) 288-6623.
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. Dr. Bruce Dreyfuss M.D. is a Type-1 individual NPI.
As of the latest monthly CMS NPPES snapshot, 1,143 Rheumatology Physician providers are registered in California, and Dr. Bruce Dreyfuss M.D. is one of them. The figure refreshes each month from the federal source.