Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Stephen Harold Olsen, M.D.

Dermatopathology Physician in Ypsilanti, MI · enumerated 2007.

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

National Provider Identifier

1770605271

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Registry record

Entity type Individual (Type 1)

Name Mr. Stephen Harold Olsen

Credential M.D.

Sex Male

Practice address 5301 E Huron River Dr, Ypsilanti, MI, 48197

Phone (734) 712-3161

Fax (734) 712-2244

Enumeration date Apr 4, 2007

Last updated in NPPES Dec 15, 2020

Taxonomy & licenses

207ZP0102X Anatomic Pathology & Clinical Pathology Physician Allopathic & Osteopathic Physicians · License 4301078896 (MI) Secondary

207ND0900X Dermatopathology Physician Allopathic & Osteopathic Physicians · License 4301078896 (MI) Primary

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

Is NPI 1770605271 active?

Yes, as of the latest NPPES snapshot, NPI 1770605271 is active (record last updated 2020-12-15).

How do I verify Stephen Olsen's NPI record?

Cross-check NPI 1770605271 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 2020-12-15.