Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John William Zarrella, DMD

General Practice Dentistry in Ashland, MA · enumerated 2007 · practices at John W. Zarrella, D.M.D., LLC..

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

National Provider Identifier

1609926351

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Registry record

Entity type Individual (Type 1)

Name John William Zarrella

Credential DMD

Sex Male

Practice address 171 Main Street, Suite 100, Ashland, MA, 01721

Phone (508) 881-1280

Fax (508) 881-3529

Enumeration date Jan 12, 2007

Last updated in NPPES Jun 29, 2011

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 16914 (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.

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Frequently asked questions

Where does John Zarrella practice?

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

What is the NPI number for John Zarrella?

The National Provider Identifier (NPI) for John Zarrella is 1609926351, a Type 1 (individual) record in the CMS NPPES registry.

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John W. Zarrella, D.M.D., LLC. General Practice Dentistry · Ashland, MA NPI 1083143697

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-06-29.