Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John Tran

Hospitalist Physician in Castro Valley, CA · enumerated 2016.

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

National Provider Identifier

1104288182

Verified

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Registry record

Entity type Individual (Type 1)

Name John Tran

Sex Male

Practice address 20103 Lake Chabot Rd, Castro Valley, CA, 94546

Phone (510) 727-3256

Fax (510) 727-3107

Enumeration date Mar 28, 2016

Last updated in NPPES Sep 25, 2019

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 20A16057 (CA) Secondary

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 20A16057 (CA) Primary

Other identifiers

Identifier	Type	State	Issuer
20A16057	Other	CA	STATE MEDICAL LICENSE

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 John Tran?

John Tran is registered in NPPES with the primary taxonomy of Hospitalist 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 2019-09-25.