Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mrs. Karen Lisa Zar, OD
Optometrist in Waltham, MA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1780786780
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Registry record
Entity type Individual (Type 1)
Name Mrs. Karen Lisa Zar
Credential OD
Sex Female
Practice address 1601 Trapelo Rd, Suite 184, Waltham, MA, 02451
Phone (781) 890-1023
Fax (781) 890-2507
Enumeration date Sep 1, 2006
Last updated in NPPES Nov 21, 2011
Taxonomy & licenses
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 0705586 | Medicaid | MA | - |
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
What is the NPI number for Karen Zar?
The National Provider Identifier (NPI) for Karen Zar is 1780786780, a Type 1 (individual) record in the CMS NPPES registry.
Where does Karen Zar practice?
The practice location on file with NPPES is in Waltham, MA. 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 2011-11-21.