Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Mohammad Reza Hajighasemi-Ossareh, MD

Individual provider Neurology Physician · NPI 1144683137

Mohammad Reza Hajighasemi-Ossareh, MD practises Neurology in Westminster, California. Qualified in 2016, 10 years ago. Practices with Summit Neurology Inc, a 3-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Arizona, California, Florida and Georgia and 3 more.

Years since qualifying
10
Licensed in
AZ, CA, FL, GA, KY, NC
In the registry since
2016
Specialties on file
7
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

200 Hospital Cir
Westminster, CA 92683-3910
Phone: (657) 666-7700
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Neurology Physician (primary) Taxonomy 2084N0400X · Licence A150719 (CA)
Neurology Physician Taxonomy 2084N0400X · Licence TPME1293 (FL)
Neurology Physician Taxonomy 2084N0400X · Licence 63148 (AZ)
Neurology Physician Taxonomy 2084N0400X · Licence 55605 (KY)
Neurology Physician Taxonomy 2084N0400X · Licence 0101272074 (VA)
Neurology Physician Taxonomy 2084N0400X · Licence 88488 (GA)
Neurology Physician Taxonomy 2084N0400X · Licence 2021-02711 (NC)

Record details

NPI number1144683137
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 29, 2016
Last updated in NPPESFebruary 13, 2026
Certification dateFebruary 13, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNEUROLOGY
Medical schoolOTHER
Graduated 2016 (10 years in practice)
Group practice Summit Neurology Inc — 3 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations4 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients700
Services billed 1,939 a service is one billed item, such as a visit, a test or a procedure
Average patient age78

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $51 2 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Other providers in Westminster