Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Nicholas Deignan, D.C.

Chiropractor in Barrington, IL · enumerated 2011 · practices at Deignan Family Chiropractic LLC.

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

National Provider Identifier

1366740128

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Registry record

Entity type Individual (Type 1)

Name Dr. Nicholas Deignan

Credential D.C.

Sex Male

Practice address Barrington, IL, 60010

Phone (847) 277-2990

Fax (847) 277-2991

Enumeration date Mar 3, 2011

Last updated in NPPES Oct 22, 2014

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License 4200 (OH) Secondary

111N00000X Chiropractor Chiropractic Providers · License 038011878 (IL) Primary

DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC 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

What specialty is Nicholas Deignan?

Nicholas Deignan is registered in NPPES with the primary taxonomy of Chiropractor. 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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Erin White Mechanotherapist · Barrington, IL NPI 1932194412 Delphine Deignan Chiropractor · Barrington, IL NPI 1295978567 Deignan Family Chiropractic LLC Chiropractor · Barrington, IL NPI 1689072357

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-10-22.