Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Marion M Hau, O.D.

Optometrist in East Boston, MA · enumerated 2011.

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

National Provider Identifier

1326328493

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Registry record

Entity type Individual (Type 1)

Name Marion M Hau

Credential O.D.

Sex Female

Practice address 10 Gove St, East Boston, MA, 02128

Phone (617) 569-5800

Fax (617) 568-4780

Enumeration date Aug 22, 2011

Last updated in NPPES Jul 13, 2012

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 4877 (MA) Primary

OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1326328493 active?

Yes, as of the latest NPPES snapshot, NPI 1326328493 is active (record last updated 2012-07-13).

How do I verify Marion Hau's NPI record?

Cross-check NPI 1326328493 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-07-13.