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

Dr. William Brian Tregellas, D.C.

Chiropractor in Carrollton, TX · enumerated 2011.

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

National Provider Identifier

1689959314

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Registry record

Entity type Individual (Type 1)

Name Dr. William Brian Tregellas

Credential D.C.

Sex Male

Practice address Carrollton, TX, 75006

Phone (972) 466-2273

Enumeration date Oct 13, 2011

Last updated in NPPES Jan 12, 2012

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

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License 11791 (TX) 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 William Tregellas?

William Tregellas 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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Jerry Johnson Chiropractor · Carrollton, TX NPI 1346253499 Stephan Conley Chiropractor · Carrollton, TX NPI 1760838130

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-01-12.