Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Istvan Felker, DDS

Dentist in Susanville, CA · enumerated 2005.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1215920715

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Registry record

Entity type Individual (Type 1)

Name Dr. Istvan Felker

Credential DDS

Sex Male

Practice address 1850 Spring Ridge Dr, Northeastern Rural Health Center Suite H, Susanville, CA, 96130

Phone (530) 251-5000

Enumeration date Aug 30, 2005

Last updated in NPPES Jun 10, 2011

Taxonomy & licenses

122300000X Dentist Dental Providers · License 49311 (CA) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1215920715 active?

Yes, as of the latest NPPES snapshot, NPI 1215920715 is active (record last updated 2011-06-10).

How do I verify Istvan Felker's NPI record?

Cross-check NPI 1215920715 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-06-10.