Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Associates in Head & Neck Surgery

Otolaryngology Physician in Chicago, IL · enumerated 2005 · authorized official Thomas Nielsen, President.

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

National Provider Identifier

1780674515

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Registry record

Entity type Organization (Type 2)

Legal business name Associates in Head & Neck Surgery

Practice address 1725 W Harrison St, Suite 938, Chicago, IL, 60612

Phone (312) 942-2175

Fax (312) 942-2052

Enumeration date Oct 24, 2005

Last updated in NPPES Nov 25, 2009

Taxonomy & classification

207Y00000X Otolaryngology Physician Allopathic & Osteopathic Physicians Primary

207YX0007X Plastic Surgery within the Head & Neck (Otolaryngology) Physician Allopathic & Osteopathic Physicians Secondary

Authorized official

Name Thomas Nielsen

Title President

Phone (312) 942-2175

Other identifiers

Identifier	Type	State	Issuer
CB1567	Other	IL	RRMC

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

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2009-11-25. Verify at npiregistry.cms.hhs.gov.

Where is Associates in Head & Neck Surgery located?

The practice location on file with NPPES is in Chicago, IL.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-11-25.