Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Carol Evelyn Grennan, DC, DACBN, CCN

Chiropractor in Irving, TX · enumerated 2006.

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

National Provider Identifier

1346250602

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Registry record

Entity type Individual (Type 1)

Name Carol Evelyn Grennan

Credential DC, DACBN, CCN

Sex Female

Practice address 7447 N Macarthur Blvd, Suite 180, Irving, TX, 75063

Phone (972) 253-1500

Fax (972) 253-1505

Enumeration date Aug 9, 2006

Last updated in NPPES Dec 5, 2016

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License 6435 (TX) Primary

111NN1001X Nutrition Chiropractor Chiropractic Providers · License 6435 (TX) Secondary

133NN1002X Nutrition Education Nutritionist Dietary & Nutritional Service Providers · License BOARD CERT 3918 (TX) Secondary

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 Carol Grennan?

Carol Grennan 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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Sat Gupta Family Medicine Physician · Irving, TX NPI 1013999549 James Slater Physical Medicine & Rehabilitation Physician · Irving, TX NPI 1861403537 James L Slater D.O. P.A. Physical Medicine & Rehabilitation Physician · Irving, TX NPI 1629089305 Sam Koo General Practice Dentistry · Irving, TX NPI 1164564647 Grennan Chiropractic Pllc Nutrition Chiropractor · Irving, TX NPI 1891096251 Macarthur Park Dentistry, PA Dentist · Irving, TX NPI 1033553805 Mika Shani Chiropractor · Irving, TX NPI 1699121699

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-12-05.