Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Sandy Wai Kuan Wong, M.D.

Internal Medicine Physician in San Francisco, CA · enumerated 2009 · practices at Ucsf Medical Center.

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

National Provider Identifier

1396972956

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Registry record

Entity type Individual (Type 1)

Name Dr. Sandy Wai Kuan Wong

Credential M.D.

Sex Female

Practice address San Francisco, CA, 94143

Phone (415) 353-2421

Fax (415) 353-2467

Enumeration date Jun 22, 2009

Last updated in NPPES Jan 18, 2018

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 250517 (MA) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 145511 (CA) 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 Sandy Wong?

Sandy Wong 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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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-01-18.