NPI Portal NPI Lookup & Verification

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

Dr. Timothy James Byrnes, D.M.D.

Pediatric Dentistry in Northborough, MA · enumerated 2009 · practices at Moynihan Dental Specialists LLC.

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

National Provider Identifier

1396976866

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Registry record

Entity type Individual (Type 1)
Name Dr. Timothy James Byrnes
Credential D.M.D.
Sex Male
Practice address Northborough, MA, 01532
Phone (508) 393-7495
Enumeration date Aug 2, 2009
Last updated in NPPES Sep 9, 2020

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

Taxonomy & licenses

122300000X Dentist Dental Providers · License DS037869 (PA) Secondary
1223G0001X General Practice Dentistry Dental Providers · License 10006 (CO) Secondary
1223P0221X Pediatric Dentistry Dental Providers · License DN1856960 (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

What specialty is Timothy Byrnes?
Timothy Byrnes is registered in NPPES with the primary taxonomy of Pediatric Dentistry. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-09-09.