NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Aronson & Rosenthal MD Inc

Obstetrics & Gynecology Physician in Torrance, CA · enumerated 2008 · authorized official Marc Rosenthal, President.

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

National Provider Identifier

1811167257

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name Aronson & Rosenthal MD Inc
Practice address 3440 Lomita Blvd, Suite 120, Torrance, CA, 90505
Enumeration date Feb 29, 2008
Last updated in NPPES May 22, 2015

Taxonomy & classification

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Marc Rosenthal
Title President

Other identifiers

Identifier Type State Issuer
W13862 Other - MEDICARE ID

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 current is this record?
Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2015-05-22. Verify at npiregistry.cms.hhs.gov.
Where is Aronson & Rosenthal MD Inc located?
The practice location on file with NPPES is in Torrance, CA.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-05-22.