Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Marvin C Mah, Od, Inc

Q: What type of organization is Marvin C Mah, Od, Inc?

Marvin C Mah, Od, Inc is registered in NPPES as a Optometrist (its primary provider taxonomy).

Optometrist in Fremont, CA · enumerated 2012 · authorized official Marvin Mah, President.

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

National Provider Identifier

1437417433

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Registry record

Entity type Organization (Type 2)

Legal business name Marvin C Mah, Od, Inc

Practice address 1556 Washington Blvd, Fremont, CA, 94539

Phone (510) 438-0508

Fax (510) 661-2362

Enumeration date Apr 26, 2012

Last updated in NPPES Apr 26, 2012

Taxonomy & classification

152W00000X Optometrist Eye and Vision Services Providers · License CA6996T (CA) Primary

Authorized official

Name Marvin Mah

Title President

Phone (510) 438-0508

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 type of organization is Marvin C Mah, Od, Inc?

Marvin C Mah, Od, Inc is registered in NPPES as a Optometrist (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

Providers at this address

Browse all →

Marvin Mah Optometrist · Fremont, CA NPI 1245228402 Julie Ching Optometrist · Fremont, CA NPI 1760817233

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-04-26.