Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Joseph Mendelis, MD

Orthopaedic Surgery Physician in Westlake Village, CA · enumerated 2015 · practices at Regents of the University of California.

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

National Provider Identifier

1467847525

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Registry record

Entity type Individual (Type 1)

Name Dr. Joseph Mendelis

Credential MD

Sex Male

Practice address 30870 Russell Ranch Rd Ste 330, Westlake Village, CA, 91362

Phone (805) 497-7015

Enumeration date Apr 5, 2015

Last updated in NPPES Mar 21, 2025

Taxonomy & licenses

207XS0117X Orthopaedic Surgery of the Spine Physician Allopathic & Osteopathic Physicians · License A168200 (CA) Secondary

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License A168200 (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

Where does Joseph Mendelis practice?

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

What is the NPI number for Joseph Mendelis?

The National Provider Identifier (NPI) for Joseph Mendelis is 1467847525, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-03-21.