Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Stephen Charles Chadwick, DMD

General Practice Dentistry in Haverhill, MA · enumerated 2006.

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

National Provider Identifier

1689742363

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Registry record

Entity type Individual (Type 1)

Name Dr. Stephen Charles Chadwick

Credential DMD

Sex Male

Practice address 118 Merrimack St, Haverhill, MA, 01831

Phone (978) 373-4150

Fax (978) 373-9620

Enumeration date Dec 1, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 04824 (MA) Primary

DMD · Doctor of Medicine in Dentistry: A licensed dentist; DMD and DDS are equivalent dental degrees. About the DMD 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 Stephen Chadwick practice?

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

What is the NPI number for Stephen Chadwick?

The National Provider Identifier (NPI) for Stephen Chadwick is 1689742363, a Type 1 (individual) record in the CMS NPPES registry.

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