Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

M. Mazen Jamal, M.D., M.P.H.

Gastroenterology Physician in Corona, CA · enumerated 2006 · practices at Mj Medical Group,Inc..

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

National Provider Identifier

1003916727

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Registry record

Entity type Individual (Type 1)

Name M. Mazen Jamal

Credential M.D., M.P.H.

Sex Male

Practice address 2097 Compton Ave Ste 103, Corona, CA, 92881

Phone (951) 934-0505

Fax (951) 444-7749

Enumeration date Sep 23, 2006

Last updated in NPPES Jun 24, 2021

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 12734 (NV) Secondary

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License A46078 (CA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
WA46078A	Other	CA	PPIN

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

Is NPI 1003916727 active?

Yes, as of the latest NPPES snapshot, NPI 1003916727 is active (record last updated 2021-06-24).

How do I verify M. Mazen Jamal's NPI record?

Cross-check NPI 1003916727 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Mladen Jecmenica Gastroenterology Physician · Corona, CA NPI 1619102837 Jenna Eugenio Medical Physician Assistant · Corona, CA NPI 1558668772 Mj Medical Group,Inc. Gastroenterology Physician · Corona, CA NPI 1699194423 Jocelyn Do Family Nurse Practitioner · Corona, CA NPI 1740724962 Bao-Khoi Vu Physician Assistant · Corona, CA NPI 1689132474 Karen Thai Physician Assistant · Corona, CA NPI 1730927377

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-06-24.