Quick answers
- Which hospitals does Mazen M. Jamal work at?
- Medicare's official clinician data lists Mazen M. Jamal at 1 hospital: Corona Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mazen M. Jamal see patients?
- Medicare's clinician data lists 1 practice location in Foothill Ranch, CA. Call before your visit to confirm the address.
- What is Mazen M. Jamal's specialty?
- Medicare lists Gastroenterology as the primary specialty.
- Does Mazen M. Jamal accept Medicare assignment?
- Yes. Medicare's clinician data says Mazen M. Jamal accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does Mazen M. Jamal offer telehealth?
- Medicare's clinician data says Mazen M. Jamal offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Mazen M. Jamal?
- (951) 934-0505, as listed in official Medicare / NPI Registry data.
- What is Mazen M. Jamal's NPI number?
- 1003916727. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mazen M. Jamal works
Medicare's Facility Affiliation Data lists Mazen M. Jamal at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Corona Regional Medical CenterCorona, CA · Acute Care Hospital · CCN 050329
Practice locations
Addresses where Mazen M. Jamal is enrolled with Medicare (CMS data updated 2026-10-02).
- 26781 Portola Pkwy, Suite 4eFoothill Ranch, CA 92610 (951) 934‑0505
Group practices
Medicare enrollment lists Mazen M. Jamal as a member of this group (CMS data updated 2026-10-02).
- MJ Medical Group, Inc.2 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1981 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1003916727 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians