Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Mark H Barak MD

Ophthalmology Physician in La Verne, CA · enumerated 2025 · authorized official Diana Ceballos, Management.

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

National Provider Identifier

1053287755

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Registry record

Entity type Organization (Type 2)

Legal business name Mark H Barak MD

Practice address 1911 Foothill Blvd, La Verne, CA, 91750

Phone (909) 596-5900

Fax (909) 596-1655

Enumeration date Oct 11, 2025

Last updated in NPPES Oct 11, 2025

Taxonomy & classification

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Diana Ceballos

Title Management

Phone (909) 596-5900

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

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2025-10-11. Verify at npiregistry.cms.hhs.gov.

Where is Mark H Barak MD located?

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

Providers at this address

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Mark Barak Ophthalmology Physician · La Verne, CA NPI 1467594838 Anthony Rosales Massage Therapist · La Verne, CA NPI 1265307417

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-10-11.