Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

David F. Chang MD Inc

Q: What type of organization is David F. Chang MD Inc?

David F. Chang MD Inc is registered in NPPES as a Ophthalmology Physician (its primary provider taxonomy).

Ophthalmology Physician in Los Altos, CA · enumerated 2010 · authorized official David Chang, President.

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

National Provider Identifier

1275857088

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Registry record

Entity type Organization (Type 2)

Legal business name David F. Chang MD Inc

Other name <Unavail>

Practice address 762 Altos Oaks Dr, Ste 1, Los Altos, CA, 94024

Phone (650) 948-9123

Fax (650) 948-0563

Enumeration date Mar 23, 2010

Last updated in NPPES Dec 16, 2015

Taxonomy & classification

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License G45581 (CA) Primary

Authorized official

Name David Chang

Title President

Phone (650) 948-9123

Other identifiers

Identifier	Type	State	Issuer
00G455810	Medicaid	CA	-

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 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.

What type of organization is David F. Chang MD Inc?

David F. Chang MD Inc is registered in NPPES as a Ophthalmology Physician (its primary provider taxonomy).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-12-16.