Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
John D Clouser, OD
Optometrist in West Chester, PA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1861470189
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Registry record
Entity type Individual (Type 1)
Name John D Clouser
Credential OD
Sex Male
Practice address 929 S High St, West Chester, PA, 19382
Phone (610) 696-1415
Fax (610) 696-8308
Enumeration date Jan 6, 2006
Last updated in NPPES Mar 17, 2016
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 |
|---|---|---|---|
| 580000571 | Other | PA | 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 Clouser practice?
The practice location on file with NPPES is in West Chester, PA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for John Clouser?
The National Provider Identifier (NPI) for John Clouser is 1861470189, 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 2016-03-17.