Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William Henry Slavin IV, DDS

General Practice Dentistry in Manteno, IL · enumerated 2005 · practices at William H. Slavin DDS Ltd.

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

National Provider Identifier

1992708978

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Registry record

Entity type Individual (Type 1)

Name Dr. William Henry Slavin IV

Credential DDS

Sex Male

Practice address 1 N Main St, Manteno, IL, 60950

Phone (815) 468-8832

Fax (815) 468-8862

Enumeration date May 24, 2005

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

1223G0001X General Practice Dentistry 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

What is the NPI number for William Slavin?

The National Provider Identifier (NPI) for William Slavin is 1992708978, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Slavin practice?

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

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William H. Slavin DDS Ltd General Practice Dentistry · Manteno, IL NPI 1962426593

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