NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Mark Kim-Leon Khoo, MD

Internal Medicine Physician in Hayward, CA · enumerated 2006.

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

National Provider Identifier

1659351930

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Mr. Mark Kim-Leon Khoo
Credential MD
Sex Male
Practice address 25800 Carlos Bee Blvd, Csueb Student Health Services, Hayward, CA, 94542
Phone (510) 885-3735
Fax (510) 885-3230
Enumeration date Jan 20, 2006
Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License G67768 (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
00G677680 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 the NPI number for Mark Khoo?
The National Provider Identifier (NPI) for Mark Khoo is 1659351930, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mark Khoo practice?
The practice location on file with NPPES is in Hayward, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.