Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Ronald Reiner Wempen, MD

Preventive Medicine/Occupational Environmental Medicine Physician in Irvine, CA · enumerated 2007.

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

National Provider Identifier

1497880538

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Registry record

Entity type Individual (Type 1)

Name Dr. Ronald Reiner Wempen

Credential MD

Sex Male

Practice address 14795 Jeffrey Road, Suite 101, Irvine, CA, 92618

Phone (949) 557-8751

Fax (949) 551-1272

Enumeration date Feb 22, 2007

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

2083P0500X Preventive Medicine/Occupational Environmental Medicine Physician Allopathic & Osteopathic Physicians · License G18070 (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

How do I verify Ronald Wempen's NPI record?

Cross-check NPI 1497880538 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1497880538 active?

Yes, as of the latest NPPES snapshot, NPI 1497880538 is active (record last updated 2007-07-08).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.