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

Dr. William Earl Hammond, D.C.

Chiropractor in Pontiac, IL · enumerated 2007.

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

National Provider Identifier

1861601171

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Registry record

Entity type Individual (Type 1)

Name Dr. William Earl Hammond

Credential D.C.

Sex Male

Practice address Pontiac, IL, 61764

Phone (815) 419-5428

Enumeration date May 22, 2007

Last updated in NPPES Sep 19, 2012

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

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License 038003973 (IL) 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

Where does William Hammond practice?

The practice location on file with NPPES is in Pontiac, IL. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for William Hammond?

The National Provider Identifier (NPI) for William Hammond is 1861601171, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-09-19.