Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Allen Dennis Olmstead, OD

Optometrist in Charlotte, MI · enumerated 2006.

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

National Provider Identifier

1215981139

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Registry record

Entity type Individual (Type 1)

Name Dr. Allen Dennis Olmstead

Credential OD

Sex Male

Practice address 123 Lansing St, Charlotte, MI, 48813

Phone (517) 543-2020

Fax (517) 543-0311

Enumeration date May 22, 2006

Last updated in NPPES Jun 22, 2010

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 4901002705 (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
AO002705	Other	-	BCBS OF MI
2200025	Other	MI	PHP OF MID MICHIGAN
410029436	Other	-	MEDICARE RAILROAD
410029436	Other	-	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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1215981139 active?

Yes, as of the latest NPPES snapshot, NPI 1215981139 is active (record last updated 2010-06-22).

How do I verify Allen Olmstead's NPI record?

Cross-check NPI 1215981139 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-06-22.