Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. John Zelnar, O.D.
Optometrist in Klamath Falls, OR · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1376502807
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Registry record
Entity type Individual (Type 1)
Name Dr. John Zelnar
Credential O.D.
Sex Male
Practice address 2640 Biehn St, Klamath Falls, OR, 97601
Phone (541) 884-3148
Fax (541) 884-3373
Enumeration date Mar 22, 2006
Last updated in NPPES Jul 27, 2010
Taxonomy & licenses
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 221044 | Medicaid | OR | - |
| 004571005 | Other | OR | BCBS |
| 410037856 | Other | OR | RAILROAD MEDICARE |
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.
Frequently asked questions
Where does John Zelnar practice?
The practice location on file with NPPES is in Klamath Falls, OR. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for John Zelnar?
The National Provider Identifier (NPI) for John Zelnar is 1376502807, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-07-27.