Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. William J. Koppin

Optometrist in Birmingham, MI · enumerated 2007.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1912194531

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Registry record

Entity type Individual (Type 1)

Name Dr. William J. Koppin

Sex Male

Practice address Birmingham, MI, 48009

Phone (248) 645-0075

Fax (248) 645-6917

Enumeration date Sep 27, 2007

Last updated in NPPES Sep 27, 2007

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 4901003204 (MI) Primary

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does William Koppin practice?

The practice location on file with NPPES is in Birmingham, MI. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for William Koppin?

The National Provider Identifier (NPI) for William Koppin is 1912194531, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-09-27.