Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Matthew R Kolesar

Periodontics in Washington, DC · enumerated 2006.

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

National Provider Identifier

1649360348

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Registry record

Entity type Individual (Type 1)

Name Dr. Matthew R Kolesar

Sex Male

Practice address 2311 M St Nw, Suite 500, Washington, DC, 20037

Phone (202) 296-3360

Fax (202) 728-0294

Enumeration date Oct 13, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

1223P0300X Periodontics Dental Providers · License DEN1000537 (DC) Primary

Other identifiers

Identifier	Type	State	Issuer
DEN1000537	Other	DC	DC DENTAL LICENSE NUMBER

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

What is the NPI number for Matthew Kolesar?

The National Provider Identifier (NPI) for Matthew Kolesar is 1649360348, a Type 1 (individual) record in the CMS NPPES registry.

Where does Matthew Kolesar practice?

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

Other providers at this practice address

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