Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Kolleen Elizabeth Gregory, DC

Chiropractor in Pasadena, CA · enumerated 2006.

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

National Provider Identifier

1265501464

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Registry record

Entity type Individual (Type 1)

Name Dr. Kolleen Elizabeth Gregory

Credential DC

Sex Female

Practice address 236 W Mountain St, Suite 107, Pasadena, CA, 91103

Phone (626) 449-0900

Fax (626) 449-0800

Enumeration date Nov 6, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License DC29435 (CA) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Kolleen Gregory?

Kolleen Gregory 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.