Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Olivia S. Walker, O.D.
Optometrist in Salem, IN · enumerated 2017.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1144759002
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Registry record
Entity type Individual (Type 1)
Name Olivia S. Walker
Credential O.D.
Sex Female
Practice address 600 S Main St, Salem, IN, 47167
Phone (812) 883-2700
Fax (812) 883-2752
Enumeration date Jun 5, 2017
Last updated in NPPES Jul 21, 2022
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 |
|---|---|---|---|
| 22139003 | Other | IN | INDIANA MEDICARE |
| 300003562 | Medicaid | IN | - |
| 18004026A | Other | IN | IN LICENSE |
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 Olivia Walker?
Olivia Walker 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.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-21.