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

Dr. Oscar O Isidoro, MD

Radiology Clinic/Center in Stockton, CA · enumerated 2007.

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

National Provider Identifier

1588793103

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Registry record

Entity type Individual (Type 1)

Name Dr. Oscar O Isidoro

Credential MD

Sex Male

Practice address Stockton, CA, 95204

Phone (209) 466-2000

Enumeration date Mar 2, 2007

Last updated in NPPES Mar 7, 2023

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

261QR0200X Radiology Clinic/Center Ambulatory Health Care Facilities · License C52637 (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
C52637	Other	CA	CALIFORNIA 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

Is NPI 1588793103 active?

Yes, as of the latest NPPES snapshot, NPI 1588793103 is active (record last updated 2023-03-07).

How do I verify Oscar Isidoro's NPI record?

Cross-check NPI 1588793103 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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Janwyn Funamura Pediatrics Physician · Stockton, CA NPI 1093786022 Stockton Mri & Molecular Imaging Medical Center Inc Magnetic Resonance Imaging (MRI) Clinic/Center · Stockton, CA NPI 1073558656 Javad Jamshidi Diagnostic Ultrasound Physician · Stockton, CA NPI 1982762365 Francis Isidoro Nuclear Imaging & Therapy Physician · Stockton, CA NPI 1548328933 Jack Funamura Diagnostic Radiology Physician · Stockton, CA NPI 1407915739 Delta Radiology Medical Group, Inc. Specialist · Stockton, CA NPI 1568587665 Delta Radiology Medical Group, Inc. Diagnostic Radiology Physician · Stockton, CA NPI 1730353137

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-07.