Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Allison Marie Ast, M.D.

Pediatrics Physician in Los Gatos, CA · enumerated 2011 · practices at Sutter Bay Medical Foundation.

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

National Provider Identifier

1356640502

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Registry record

Entity type Individual (Type 1)

Name Ms. Allison Marie Ast

Credential M.D.

Sex Female

Practice address 15400 Los Gatos Blvd, Los Gatos, CA, 95032

Phone (408) 730-6222

Enumeration date Mar 26, 2011

Last updated in NPPES Nov 3, 2022

Taxonomy & licenses

2080P0207X Pediatric Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 56442 (TN) Secondary

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 56442 (TN) Secondary

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License C181963 (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
2461117	Medicaid	LA	-

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

How do I verify Allison Ast's NPI record?

Cross-check NPI 1356640502 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1356640502 active?

Yes, as of the latest NPPES snapshot, NPI 1356640502 is active (record last updated 2022-11-03).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-11-03.