Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Margaret M Mastrian, O.D.
Optometrist in Hermitage, PA · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1972586766
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Registry record
Entity type Individual (Type 1)
Name Margaret M Mastrian
Credential O.D.
Sex Female
Practice address 490 N Kerrwood Dr, Suite 203, Hermitage, PA, 16148
Phone (724) 342-2733
Fax (724) 342-6652
Enumeration date Nov 25, 2005
Last updated in NPPES Jul 6, 2010
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 |
|---|---|---|---|
| 0807121 | Medicaid | OH | - |
| 001214422 | Medicaid | PA | - |
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
How do I verify Margaret Mastrian's NPI record?
Cross-check NPI 1972586766 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1972586766 active?
Yes, as of the latest NPPES snapshot, NPI 1972586766 is active (record last updated 2010-07-06).
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-07-06.