Quick answers
- Does Mohammad R. Malekzadegan accept Medicare assignment?
- Yes. Medicare's clinician data says Mohammad R. Malekzadegan accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Mohammad R. Malekzadegan see?
- In 2024, CMS data shows 338 Original Medicare patients and 1,473 services for Mohammad R. Malekzadegan. This counts Original Medicare only and measures volume, not quality.
- What is Mohammad R. Malekzadegan's NPI number?
- 1881085207. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Mohammad R. Malekzadegan, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 338 |
|---|---|
| Services billed to Medicare | 1,473 |
| Different services or procedures | 16 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Critical care, first 30-74 minutes (99291)741 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)579 services
- Critical care, each additional 30 minutes (99292)47 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)29 services
- Emergent insertion of breathing tube into windpipe using an endoscope (31500)17 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Diabetes72%
- Heart failure72%
- Chronic kidney disease69%
- COPD61%
Hospitals where Mohammad R. Malekzadegan works
Medicare's Facility Affiliation Data lists Mohammad R. Malekzadegan at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Parkview Community Hospital Medical CenterRiverside, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050102
- Riverside Community HospitalRiverside, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050022
- UCI Health-OrangeOrange, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050348
Practice locations
Addresses where Mohammad R. Malekzadegan is enrolled with Medicare (CMS data updated October 2, 2026).
- 101 the City Dr SOrange, CA 92868 (714) 456‑7002
- 4234 Riverwalk Pkwy, Suite 230Riverside, CA 92505 (951) 781‑3672
Group practices
Medicare enrollment lists Mohammad R. Malekzadegan as a member of these groups (CMS data updated October 2, 2026).
- UC Regents319 clinicians in the group
- Regents of the University of California60 clinicians in the group
- El-Bershawi Medical Corp49 clinicians in the group
Specialties
Other pulmonologists in Orange
Clinicians with the same Medicare primary specialty in Orange, CA — not a recommendation.
Other clinicians in UC Regents
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2005 (21 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1881085207 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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