Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark A Olson, M.D.

Neurology Physician in Warren, MI · enumerated 2005.

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

National Provider Identifier

1225020746

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Registry record

Entity type Individual (Type 1)

Name Mark A Olson

Credential M.D.

Sex Male

Practice address 11012 E 13 Mile Rd, Suite 112, Warren, MI, 48093

Phone (586) 573-6880

Fax (586) 573-2562

Enumeration date Aug 19, 2005

Last updated in NPPES Nov 8, 2013

Taxonomy & licenses

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 4301044866 (MI) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
1997933	Medicaid	MI	-
700E021830	Other	MI	BCBS
700F340300	Other	MI	BCBS
MO044866	Other	MI	BCBS PIN #
700E021910	Other	MI	BCBS

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 specialty is Mark Olson?

Mark Olson is registered in NPPES with the primary taxonomy of Neurology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-11-08.