Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William A Parker, DC

Chiropractor in Clackamas, OR · enumerated 2006.

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

National Provider Identifier

1003977448

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Registry record

Entity type Individual (Type 1)

Name Dr. William A Parker

Credential DC

Sex Male

Practice address 15875 Se 114th Ave Ste C, Clackamas, OR, 97015

Phone (503) 839-2000

Fax (503) 305-8027

Enumeration date Dec 12, 2006

Last updated in NPPES Jul 18, 2018

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License 3589 (OR) 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

How do I verify William Parker's NPI record?

Cross-check NPI 1003977448 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1003977448 active?

Yes, as of the latest NPPES snapshot, NPI 1003977448 is active (record last updated 2018-07-18).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-07-18.