Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

May Cheng-Su Chen, MD

Q: What is the NPI number for May Chen?

The National Provider Identifier (NPI) for May Chen is 1386603447, a Type 1 (individual) record in the CMS NPPES registry.

Medical Oncology Physician in Campbell, CA · enumerated 2006.

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

National Provider Identifier

1386603447

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Registry record

Entity type Individual (Type 1)

Name May Cheng-Su Chen

Credential MD

Sex Female

Practice address 50 E Hamilton Ave, Ste 200, Campbell, CA, 95008

Phone (408) 376-2300

Fax (408) 376-2316

Enumeration date Mar 18, 2006

Last updated in NPPES Oct 22, 2007

Taxonomy & licenses

207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians · License G83884 (CA) Primary

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

Other identifiers

Identifier	Type	State	Issuer
00G838840	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

Where does May Chen practice?

The practice location on file with NPPES is in Campbell, CA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for May Chen?

The National Provider Identifier (NPI) for May Chen is 1386603447, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-10-22.