NPI Portal NPI Lookup & Verification

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

Ann Graves Walker, MD

Internal Medicine Physician in Walnut, CA · enumerated 2007 · practices at Mt. San Antonio College.

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

National Provider Identifier

1730374901

Verified

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Registry record

Entity type Individual (Type 1)
Name Ann Graves Walker
Credential MD
Sex Female
Practice address Walnut, CA, 91789
Phone (909) 594-5611
Fax (909) 468-3997
Enumeration date Sep 11, 2007
Last updated in NPPES Sep 11, 2007

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 G85945 (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
WA656313 Medicaid NJ -

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

Is NPI 1730374901 active?
Yes, as of the latest NPPES snapshot, NPI 1730374901 is active (record last updated 2007-09-11).
How do I verify Ann Walker's NPI record?
Cross-check NPI 1730374901 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-09-11.