Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Diane L Walker, OD
Optometrist in Richland Center, WI · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1487607248
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Registry record
Entity type Individual (Type 1)
Name Diane L Walker
Credential OD
Sex Female
Practice address 100 N Main St, Richland Center, WI, 53581
Phone (608) 647-8995
Fax (608) 647-2569
Enumeration date May 19, 2006
Last updated in NPPES Jul 8, 2007
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 |
|---|---|---|---|
| 38591400 | Medicaid | WI | - |
| 8070 | Other | WI | DEAN HEALTH INSURANCE |
| 1006556 | Other | WI | PHYSICIANS PLUS |
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 Diane Walker?
Diane 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.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.