Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Allison Naiquan Zhang, MD

Gastroenterology Physician in San Jose, CA · enumerated 2013.

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

National Provider Identifier

1821435900

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Allison Naiquan Zhang

Credential MD

Sex Female

Practice address 2585 Samaritan Dr Ste 25 2nd Fl, San Jose, CA, 95124

Phone (650) 736-5555

Enumeration date May 29, 2013

Last updated in NPPES Apr 12, 2024

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License A165178 (CA) Secondary

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License A165178 (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 is the NPI number for Allison Zhang?

The National Provider Identifier (NPI) for Allison Zhang is 1821435900, a Type 1 (individual) record in the CMS NPPES registry.

Where does Allison Zhang practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-04-12.