Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William Michael Auffinger Jr., DDS

General Practice Dentistry in Pepperell, MA · enumerated 2006.

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

National Provider Identifier

1922101195

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Registry record

Entity type Individual (Type 1)

Name Dr. William Michael Auffinger Jr.

Credential DDS

Sex Male

Practice address 40 Park St, Pepperell, MA, 01463

Phone (978) 433-2128

Fax (978) 433-1951

Enumeration date Sep 6, 2006

Last updated in NPPES Sep 22, 2014

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 13685 (MA) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does William Auffinger practice?

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

What is the NPI number for William Auffinger?

The National Provider Identifier (NPI) for William Auffinger is 1922101195, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-09-22.