Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John Ruddy, M.D.

Pulmonary Disease Physician in San Leandro, CA · enumerated 2005.

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

National Provider Identifier

1902890130

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Registry record

Entity type Individual (Type 1)

Name John Ruddy

Credential M.D.

Sex Male

Practice address 13939 E 14th St, San Leandro, CA, 94578

Phone (510) 263-3300

Fax (510) 263-3350

Enumeration date Sep 2, 2005

Last updated in NPPES Mar 25, 2021

Taxonomy & licenses

207RP1001X Pulmonary Disease Physician Allopathic & Osteopathic Physicians · License G58800 (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
CA160376	Medicaid	CA	-

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.

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Frequently asked questions

How do I verify John Ruddy's NPI record?

Cross-check NPI 1902890130 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1902890130 active?

Yes, as of the latest NPPES snapshot, NPI 1902890130 is active (record last updated 2021-03-25).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-03-25.