Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Sherry H Day, OD

Optometrist in Ann Arbor, MI · enumerated 2007.

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

National Provider Identifier

1013061977

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Registry record

Entity type Individual (Type 1)

Name Sherry H Day

Credential OD

Sex Female

Practice address 1000 Wall St, Ann Arbor, MI, 48105

Phone (734) 764-4190

Enumeration date Jan 22, 2007

Last updated in NPPES Feb 21, 2012

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 4901004054 (MI) Primary

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
4621790	Medicaid	MI	-

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

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.

What specialty is Sherry Day?

Sherry Day 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-02-21.