Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Karen Antwiler, M.D.

Addiction Medicine (Family Medicine) Physician in Cathedral City, CA · enumerated 2018.

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

National Provider Identifier

1598255465

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Registry record

Entity type Individual (Type 1)

Name Dr. Karen Antwiler

Credential M.D.

Sex Female

Practice address 67780 E Palm Canyon Dr, Cathedral City, CA, 92234

Phone (760) 773-4300

Fax (760) 837-8994

Enumeration date May 15, 2018

Last updated in NPPES Feb 4, 2025

Taxonomy & licenses

207QA0401X Addiction Medicine (Family Medicine) Physician Allopathic & Osteopathic Physicians · License A178391 (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 Karen Antwiler practice?

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

What is the NPI number for Karen Antwiler?

The National Provider Identifier (NPI) for Karen Antwiler is 1598255465, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-02-04.