Quick answers
- Does Mohammad R. Hajighasemi-Ossareh accept Medicare assignment?
- Yes. Medicare's clinician data says Mohammad R. Hajighasemi-Ossareh 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. Hajighasemi-Ossareh see?
- In 2024, CMS data shows 700 Original Medicare patients and 1,939 services for Mohammad R. Hajighasemi-Ossareh. This counts Original Medicare only and measures volume, not quality.
- What is Mohammad R. Hajighasemi-Ossareh's NPI number?
- 1144683137. 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. Hajighasemi-Ossareh, 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 | 700 |
|---|---|
| Services billed to Medicare | 1,939 |
| Different services or procedures | 20 |
| Participating Medicare provider | Yes |
| Average age of these patients | 78 |
Most frequent services
- Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)847 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)219 services
- Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more (99306)198 services
- Telehealth consultation, emergency department or initial inpatient, typically 50 minutes communicating with the patient via telehealth (G0426)135 services
- Telehealth consultation, emergency department or initial inpatient, typically 70 minutes or more communicating with the patient via telehealth (G0427)130 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%
- Stroke or mini-stroke69%
- Arthritis57%
- Diabetes48%
- Depression46%
Hospitals where Mohammad R. Hajighasemi-Ossareh works
Medicare's Facility Affiliation Data lists Mohammad R. Hajighasemi-Ossareh 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.
- Coastal Communities HospitalSanta Ana, CA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 050747
- Hoag Memorial Hospital PresbyterianNewport Beach, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050224
- Memorialcare Orange Coast Medical CenterFountain Valley, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050678
- Providence St. Joseph HospitalOrange, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050069
- 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. Hajighasemi-Ossareh is enrolled with Medicare (CMS data updated October 2, 2026).
- 18035 Brookhurst St, Suite 1300Fountain Valley, CA 92708 (562) 988‑9333
- 3333 Silas Creek PkwyWinston Salem, NC 27103 (336) 718‑7597
- 800 E 5th StOntario, CA 91764 (949) 891‑1530
Group practices
Medicare enrollment lists Mohammad R. Hajighasemi-Ossareh as a member of these groups (CMS data updated October 2, 2026).
- Novant Health Medical Group, LLC2,430 clinicians in the group
- Memorialcare Medical Foundation566 clinicians in the group
- Summit Neurology Inc3 clinicians in the group
Specialties
- Neurologyprimary
Other neurologists in Fountain Valley
Clinicians with the same Medicare primary specialty in Fountain Valley, CA — not a recommendation.
Other clinicians in Novant Health Medical Group, LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2016 (10 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1144683137 |
| 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