Quick answers
- Which hospitals does Mohammad A. Hajjar work at?
- Medicare's official clinician data lists Mohammad A. Hajjar at 5 hospitals: Foothill Regional Medical Center, Garden Grove Hospital & Medical Center, Hoag Memorial Hospital Presbyterian, Orange County Global Medical Center and UCI Health-Orange. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mohammad A. Hajjar see patients?
- Medicare's clinician data lists 5 practice locations, including Santa Ana, CA, Garden Grove, CA and Huntington Beach, CA. Call before your visit to confirm the address.
- What is Mohammad A. Hajjar's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty.
- Does Mohammad A. Hajjar accept Medicare assignment?
- Yes. Medicare's clinician data says Mohammad A. Hajjar 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 Mohammad A. Hajjar offer telehealth?
- Medicare's clinician data says Mohammad A. Hajjar offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Mohammad A. Hajjar?
- (714) 696-1498, as listed in official Medicare / NPI Registry data.
- What is Mohammad A. Hajjar's NPI number?
- 1235350893. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mohammad A. Hajjar works
Medicare's Facility Affiliation Data lists Mohammad A. Hajjar at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Foothill Regional Medical CenterTustin, CA · Acute Care Hospital · CCN 050780
- Garden Grove Hospital & Medical CenterGarden Grove, CA · Acute Care Hospital · CCN 050230
- Hoag Memorial Hospital PresbyterianNewport Beach, CA · Acute Care Hospital · CCN 050224
- Orange County Global Medical CenterSanta Ana, CA · Acute Care Hospital · CCN 050746
- UCI Health-OrangeOrange, CA · Acute Care Hospital · CCN 050348
Practice locations
Addresses where Mohammad A. Hajjar is enrolled with Medicare (CMS data updated 2026-10-02).
- 1220 Hemlock Way, Suite 203Santa Ana, CA 92707 (714) 696‑1498
- 12555 Garden Grove Blvd, Suite 403Garden Grove, CA 92843 (714) 617‑2626
- 17822 Beach Blvd, Suite 373Huntington Beach, CA 92647 (714) 848‑3333
- 3700 Katella Ave, Suite CLos Alamitos, CA 90720 (562) 583‑2250
- 999 N Tustin Ave, Suite 205Santa Ana, CA 92705 (714) 617‑2626
Group practices
Medicare enrollment lists Mohammad A. Hajjar as a member of this group (CMS data updated 2026-10-02).
- Prohealth Partners, a Medical Group239 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in California →
Other cardiologists in Santa Ana
Clinicians with the same Medicare primary specialty in Santa Ana, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2000 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1235350893 |
| 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