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Arta Physicians Medical Group

Health Maintenance Organization in Irvine, CA · enumerated 2007 · authorized official Robert Sorrentino, Chief Medical Officer.

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

National Provider Identifier

1285837856

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Registry record

Entity type Organization (Type 2)
Legal business name Arta Physicians Medical Group
Practice address 3333 Michelson Dr Ste 735, Irvine, CA, 92612
Phone (949) 260-6500
Fax (949) 567-0645
Enumeration date Jun 8, 2007
Last updated in NPPES Aug 22, 2020

Taxonomy & classification

302R00000X Health Maintenance Organization Managed Care Organizations Primary

Authorized official

Name Robert Sorrentino
Title Chief Medical Officer
Phone (949) 260-6580

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.

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Frequently asked questions

What is a Type 2 NPI?
A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.
What type of organization is Arta Physicians Medical Group?
Arta Physicians Medical Group is registered in NPPES as a Health Maintenance Organization (its primary provider taxonomy).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.