Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Jeffrey A. Olson, M.D,

Internal Medicine Physician in Chicago, IL · enumerated 2006.

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

National Provider Identifier

1952374795

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Registry record

Entity type Individual (Type 1)

Name Jeffrey A. Olson

Credential M.D,

Sex Male

Practice address 5215 N California Ave, Chicago, IL, 60625

Phone (773) 878-3627

Fax (773) 275-5860

Enumeration date Feb 10, 2006

Last updated in NPPES Mar 7, 2023

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License A75543 (CA) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 0000 (IL) 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
036.110640	Other	IL	STATE LICENSE
336.071295	Other	IL	CDS LIC

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

Where does Jeffrey Olson practice?

The practice location on file with NPPES is in Chicago, IL. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Jeffrey Olson?

The National Provider Identifier (NPI) for Jeffrey Olson is 1952374795, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-07.