Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum Organization subpart

One Medical Group, Inc.

Family Medicine Physician in Hawthorne, CA · enumerated 2015 · authorized official Andrew Diamond, President.

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

National Provider Identifier

1922470392

Verified

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Registry record

Entity type Organization (Type 2)

Legal business name One Medical Group, Inc.

Other name <Unavail>

Parent organization One Medical Group, Inc.

Practice address 3615 Jack Northrop Ave., Suite 100, Hawthorne, CA, 90250

Phone (310) 300-1051

Fax (310) 300-1052

Enumeration date Oct 26, 2015

Last updated in NPPES Jul 13, 2023

Taxonomy & classification

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians Primary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Secondary

Authorized official

Name Andrew Diamond

Title President

Phone (415) 658-6791

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 is One Medical Group, Inc. located?

The practice location on file with NPPES is in Hawthorne, CA.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2023-07-13. Verify at npiregistry.cms.hhs.gov.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-07-13.