Diane Tjornhom MD
About this NPIWhat this record shows.
NPI 1649339235 is registered to Diane Tjornhom MD, a Rheumatology Physician practising at 9400 Rosecrans Ave in Bellflower, California. Rheumatology Physician is a recognised medical specialty under the National Uniform Claim Committee (NUCC) taxonomy. Diane Tjornhom MD has been enumerated in the National Provider Identifier (NPI) registry since 2006.
Your brand here.
Medicare enrollment
This provider holds 2 Medicare enrollments 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
- I20100927000601Internal MedicineCA
- I20250804000936RheumatologyHI
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 Diane Tjornhom MD accepts. To confirm in-network status with your specific health plan, contact Diane Tjornhom MD directly at (562) 461-3000.
Frequently asked
Yes. NPI 1649339235 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 (562) 461-3000.
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 Tjornhom MD is a Type-1 individual NPI.