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

Dr. Clare Masson, O.D

Optometrist in Tecumseh, MI · enumerated 2015.

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

National Provider Identifier

1831572858

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Registry record

Entity type Individual (Type 1)
Name Dr. Clare Masson
Credential O.D
Sex Female
Practice address Tecumseh, MI, 49286
Phone (517) 423-2148
Fax (517) 423-7120
Enumeration date Jul 8, 2015
Last updated in NPPES Oct 14, 2015

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 4901004889 (MI) Primary
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD credential

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.

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Frequently asked questions

What is the NPI number for Clare Masson?
The National Provider Identifier (NPI) for Clare Masson is 1831572858, a Type 1 (individual) record in the CMS NPPES registry.
Where does Clare Masson practice?
The practice location on file with NPPES is in Tecumseh, MI. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-10-14.