Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Arthur Zimmerman, M.D.

Radiation Oncology Physician in Torrance, CA · enumerated 2007.

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

National Provider Identifier

1154464337

Verified

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Registry record

Entity type Individual (Type 1)

Name Arthur Zimmerman

Credential M.D.

Sex Male

Practice address 1000 W Carson St, Box 480, Torrance, CA, 90502

Phone (310) 222-2804

Enumeration date Feb 15, 2007

Last updated in NPPES Mar 24, 2009

Taxonomy & licenses

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License G5792 (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
DA6447	Other	CA	RAILROAD MEDICARE
M050376	Other	CA	GROUP

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 1154464337 active?

Yes, as of the latest NPPES snapshot, NPI 1154464337 is active (record last updated 2009-03-24).

How do I verify Arthur Zimmerman's NPI record?

Cross-check NPI 1154464337 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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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-03-24.