Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Jeffrey S Silbernagel, OD
Optometrist in Knoxville, TN · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1326088410
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Registry record
Entity type Individual (Type 1)
Name Dr. Jeffrey S Silbernagel
Credential OD
Sex Male
Practice address 10745 Kingston Pike, Knoxville, TN, 37934
Phone (865) 288-3235
Fax (865) 288-7714
Enumeration date Jun 7, 2006
Last updated in NPPES Oct 4, 2019
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 |
|---|---|---|---|
| Q020782 | Medicaid | TN | - |
| Q008339 | Medicaid | TN | - |
| 1931870 | Medicaid | LA | - |
| 3371152 | Other | TN | 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
What specialty is Jeffrey Silbernagel?
Jeffrey Silbernagel is registered in NPPES with the primary taxonomy of Optometrist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-10-04.