Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Derrick Lynn Williamson, D.D.S.

Prosthodontics in Naperville, IL · enumerated 2007.

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

National Provider Identifier

1427261569

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Registry record

Entity type Individual (Type 1)

Name Dr. Derrick Lynn Williamson

Credential D.D.S.

Sex Male

Practice address 1220 Hobson Rd, Suite 212, Naperville, IL, 60540

Phone (630) 961-5850

Enumeration date May 7, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

1223P0700X Prosthodontics Dental Providers Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS 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

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.

What specialty is Derrick Williamson?

Derrick Williamson is registered in NPPES with the primary taxonomy of Prosthodontics. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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