Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gunnar B.J. Andersson, MD

Orthopaedic Surgery Physician in Chicago, IL · enumerated 2006.

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

National Provider Identifier

1154309110

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Registry record

Entity type Individual (Type 1)

Name Gunnar B.J. Andersson

Credential MD

Sex Male

Practice address 1611 W Harrison St, Ste 400, Chicago, IL, 60612

Phone (312) 243-4244

Fax (312) 243-2744

Enumeration date Jan 9, 2006

Last updated in NPPES Sep 12, 2011

Taxonomy & licenses

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 036071119 (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
036071119	Medicaid	IL	-
207067	Other	IL	MEDICARE PTAN LOCALITY 16
207073	Other	IL	MEDICARE PTAN LOCALITY 15
4020836	Other	-	AETNA
1633878	Other	IL	BCBS
DA4902	Other	-	RAILROAD MEDICARE PTAN
P00094329	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.

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Frequently asked questions

What specialty is Gunnar Andersson?

Gunnar Andersson is registered in NPPES with the primary taxonomy of Orthopaedic Surgery 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-09-12.