Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Constance Ann Black, DC

Chiropractor in Evanston, IL · enumerated 2006.

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

National Provider Identifier

1841366721

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Registry record

Entity type Individual (Type 1)

Name Dr. Constance Ann Black

Credential DC

Sex Female

Practice address 1609 Sherman Ave, Ste 204, Evanston, IL, 60201

Phone (847) 328-2008

Fax (847) 328-8171

Enumeration date Nov 24, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers Primary

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

Other identifiers

Identifier	Type	State	Issuer
01682433	Other	IL	BCBS

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

Is NPI 1841366721 active?

Yes, as of the latest NPPES snapshot, NPI 1841366721 is active (record last updated 2007-07-08).

How do I verify Constance Black's NPI record?

Cross-check NPI 1841366721 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 2007-07-08.