Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Timothy Yo Wu, MD

Internal Medicine Physician in Montclair, CA · enumerated 2018.

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

National Provider Identifier

1700375656

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Registry record

Entity type Individual (Type 1)

Name Timothy Yo Wu

Credential MD

Sex Male

Practice address 9525 Monte Vista Ave # 105, Montclair, CA, 91763

Phone (909) 731-2715

Enumeration date May 7, 2018

Last updated in NPPES Jul 25, 2022

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 125071848 (IL) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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

What specialty is Timothy Wu?

Timothy Wu is registered in NPPES with the primary taxonomy of Internal Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

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Atif Qadeer Internal Medicine Physician · Montclair, CA NPI 1730160201

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-25.