Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Matthew J Bak, M.D.
Plastic Surgery within the Head & Neck (Otolaryngology) Physician in Norfolk, VA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1659386076
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Registry record
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| -004 | Other | VA | TRICARE/CHAMPUS |
| PAR | Other | VA | AETNA |
| PAR | Other | VA | VIRGINIA HEALTH NETWORK |
| 373343 | Other | VA | ANTHEM BC/BS (FIRST COLONIAL RD.) |
| PAR | Other | VA | CIGNA |
| PAR | Other | VA | CORVEL/CORCARE |
| 10047408 | Other | VA | SENTARA OPTIMA HEALTH |
| 1659386076 | Medicaid | VA | - |
| PAR | Other | VA | USA MANAGED CARE |
| PAR | Other | VA | VIRGINIA PREMIER HEALTH |
| PAR | Other | VA | MULTIPLAN |
| 11764 | Other | NC | BC/BS |
| PAR | Other | VA | UNITED HEALTH CARE |
| 373342 | Other | VA | ANTHEM BC/BS (GRESHAM DR.) |
| PAR | Other | VA | FIRST HEALTH COMMERCIAL/SOUTHERN HEALTH/COVENTRY |
| 5911764 | Medicaid | NC | - |
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.
Frequently asked questions
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Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-01-28.