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Chien-Ko Wu, M.D. and Meei-Ling T Wu, M.D., Inc.

Internal Medicine Physician in Orange, CA · enumerated 2007 · authorized official Chien-Ko Wu, Co-President.

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

National Provider Identifier

1083820856

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Registry record

Entity type Organization (Type 2)
Legal business name Chien-Ko Wu, M.D. and Meei-Ling T Wu, M.D., Inc.
Practice address 991 N Tustin St, Suite 101, Orange, CA, 92867
Phone (714) 639-6162
Enumeration date May 16, 2007
Last updated in NPPES Sep 11, 2025

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License A38491 (CA) Primary
207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License A40891 (CA) Secondary

Authorized official

Name Chien-Ko Wu
Title Co-President
Phone (714) 639-6162

Other identifiers

Identifier Type State Issuer
A38491 Other CA CHIEN-KO WU, M.D.
00A384910 Medicaid CA -
A40891 Other CA MEEI-LING T WU, M.D.
00A408910 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.

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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 Chien-Ko Wu, M.D. and Meei-Ling T Wu, M.D., Inc.?
Chien-Ko Wu, M.D. and Meei-Ling T Wu, M.D., Inc. is registered in NPPES as a Internal Medicine Physician (its primary provider taxonomy).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.