Mark M. Girgis, D.O.
Neurology Physician · Riverside, CA
Mark M. Girgis, D.O. is a neurology physician with a practice address in Riverside, California, and NPI 1679921316, issued on Jun 2, 2016. Check the license on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark M. Girgis
- Credential
- D.O.
- Primary taxonomy
- Neurology Physician 2084N0400X
- License number
- 5101022184 MI
Self-reported in NPPES; status is on the state search - Practice location
- 4445 Magnolia Ave, Riverside, CA 92501
- Phone
- (951) 338-4910
- Enumerated
- Jun 2, 2016
- Record last updated
- Oct 30, 2023
- Fax
- (833) 996-0004
- Medicare enrollment
- Enrolled (PECOS I20200805001035); accepts Medicare assignment
- Medical or professional school
- Kansas City University Of Physicians And Surgeons, 2016
- Entity
- Type 1 · individual
8 nearest neurology physician records → All 2,339 in California → Look up another NPI →
Also registered at 4445 Magnolia Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joey Abadilla, MDStudent in an Organized Health Care Education/Training Program1093417818
- Rashed AbdelaalDiagnostic Radiology Physician1518726090
- Ahmed Abdelhalim, MDDiagnostic Radiology Physician1275162927
- Nirusha AbeydeeraStudent in an Organized Health Care Education/Training Program1295354454
- Alyssa Aboff, CRNA, DNPCertified Registered Nurse Anesthetist1760133292
- Brandon Abrajan, DOStudent in an Organized Health Care Education/Training Program1861141186
Verify Mark M. Girgis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of CaliforniaCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $29.14
1 payment: food and beverage; the largest payer was Abbvie Inc. The 10,858 providers of this specialty with any payment received $8,318.07 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- California Neurointerventional Surgeons, IncRiverside, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark M. Girgis among 2,339 neurology physician records in California
Mark M. Girgis, D.O. is one of 2,339 neurology physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 78% of them.
- NPI issued2016 · 78% of these records are older, 19% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2016 · median 2006 among the 1,628 with a school on file
- Record last updated2023 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084N0400X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Neurology Physician providers in California
There are 2,339 neurology physician records in California.
All 2,339 in California → Every provider in Riverside → Neurology Physician nationwide →
The 8 neurology physician records with the nearest ZIP codes
- Lama Al-Khoury, M.D.Riverside, CA 925011275635492
- Nader Boutros, MDRiverside, CA 925011376002683
- Rony Dekermenjian, M.D.Riverside, CA 925011972766657
- Mahsa Khayatkhoei, MD, MBARiverside, CA 925011962858720
- Claudia Munoz, MDRiverside, CA 925011831320068
- Henry Yang, MDRiverside, CA 925011063973212
- Rajan Preet Arora, MDRiverside, CA 925031588028377
- Waseem Ibrahim, M.D.Riverside, CA 925041346291374
Common questions
What is Mark M. Girgis, D.O.'s NPI number?
Mark M. Girgis, D.O.'s National Provider Identifier (NPI) is 1679921316, issued on Jun 2, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Mark M. Girgis, D.O. located?
The NPPES record lists a practice address at 4445 Magnolia Ave, Riverside, CA, 92501. Phone: (951) 338-4910. Providers update this record themselves, so call before visiting.
How can I verify Mark M. Girgis, D.O.'s license?
Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.