Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Amanda Nicole Graff-Baker, M.D.

Surgical Oncology Physician in San Jose, CA · enumerated 2010 · practices at Kaiser Permanente.

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

National Provider Identifier

1639495807

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Registry record

Entity type Individual (Type 1)

Name Amanda Nicole Graff-Baker

Credential M.D.

Sex Female

Practice address 280 Hospital Pkwy, San Jose, CA, 95119

Phone (408) 972-7000

Enumeration date Apr 13, 2010

Last updated in NPPES Dec 17, 2021

Taxonomy & licenses

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

2086X0206X Surgical Oncology Physician Allopathic & Osteopathic Physicians · License A141704 (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

Where does Amanda Graff-Baker practice?

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

What is the NPI number for Amanda Graff-Baker?

The National Provider Identifier (NPI) for Amanda Graff-Baker is 1639495807, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-17.