Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Mark Alan Williams, O.D.
Optometrist in West Lafayette, IN · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1508947276
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Registry record
Entity type Individual (Type 1)
Name Dr. Mark Alan Williams
Credential O.D.
Sex Male
Practice address 307 Sagamore Pkwy W, West Lafayette, IN, 47906
Phone (765) 463-4558
Fax (765) 497-2154
Enumeration date Oct 18, 2006
Last updated in NPPES Sep 28, 2020
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 |
|---|---|---|---|
| 18003424A | Other | IN | INDIANA 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 is the NPI number for Mark Williams?
The National Provider Identifier (NPI) for Mark Williams is 1508947276, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mark Williams practice?
The practice location on file with NPPES is in West Lafayette, IN. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-09-28.