Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Jeffrey N Mar MD Inc

Child & Adolescent Psychiatry Physician in Rancho Cucamonga, CA · enumerated 2008 · authorized official Jeffrey Mar, Ceo.

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

National Provider Identifier

1023279056

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Registry record

Entity type Organization (Type 2)

Legal business name Jeffrey N Mar MD Inc

Practice address 9479 Haven Ave, Rancho Cucamonga, CA, 91730

Phone (909) 771-8023

Fax (909) 989-0606

Enumeration date Jun 23, 2008

Last updated in NPPES Nov 18, 2011

Taxonomy & classification

2080P0006X Developmental - Behavioral Pediatrics Physician Allopathic & Osteopathic Physicians · License A87348 (CA) Secondary

2084P0804X Child & Adolescent Psychiatry Physician Allopathic & Osteopathic Physicians · License A87348 (CA) Primary

Authorized official

Name Jeffrey Mar

Title Ceo

Phone (909) 771-8023

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

Where is Jeffrey N Mar MD Inc located?

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

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2011-11-18. Verify at npiregistry.cms.hhs.gov.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-11-18.