Mark Susumu Shiroishi, M.D.
Neuroradiology Physician · Los Angeles, CA
Mark Susumu Shiroishi, M.D. is a neuroradiology physician with a practice address in Los Angeles, California, and NPI 1699949875, issued on Apr 17, 2008. Check the license (California A84958, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark Susumu Shiroishi
- Credential
- M.D.
- Primary taxonomy
- Neuroradiology Physician 2085N0700X
- License number
- A84958 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1500 San Pablo St FL 2, Los Angeles, CA 90033
- Phone
- (323) 442-8541
- Enumerated
- Apr 17, 2008
- Record last updated
- Nov 27, 2023
- Medicare enrollment
- Enrolled (PECOS I20090324000551); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 2001
- Entity
- Type 1 · individual
8 nearest neuroradiology physician records → All 221 in California → Look up another NPI →
Also registered at 1500 San Pablo St FL 2
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Minhal Abidi, MDDiagnostic Radiology Physician1730704529
- Seyed Mahdi Abtahi, MDDiagnostic Radiology Physician1437564135
- Evan Allgood, M.D.Diagnostic Radiology Physician1528403557
- Mariet Asadoorian, MDDiagnostic Radiology Physician1932545258
- Armonde Baghdanian, M.D.Diagnostic Radiology Physician1912260340
- Arthur Baghdanian, MDDiagnostic Radiology Physician1902168826
Verify Mark Susumu Shiroishi in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A84958Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through 2 group practices
- Keck Medicine OF Usc Imaging Centers LLCPasadena, CA
- Usc Care Medical Group IncArcadia, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Susumu Shiroishi among 221 neuroradiology physician records in California
Mark Susumu Shiroishi, M.D. is one of 221 neuroradiology physician records with a practice address in California. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 50% of them.
- NPI issued2008 · 50% of these records are older, 43% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 78% of these records are
- Graduated2001 · median 2006 among the 172 with a school on file
- Record last updated2023 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085N0700X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Neuroradiology Physician providers in California
There are 221 neuroradiology physician records in California.
All 221 in California → Every provider in Los Angeles → Neuroradiology Physician nationwide →
The 8 neuroradiology physician records with the nearest ZIP codes
- Jamshid Ahmadi, M.D.Los Angeles, CA 900331942252028
- Sarah Ceglar, MDLos Angeles, CA 900331063832533
- Saman Hazany, MDLos Angeles, CA 900331457592230
- Paul Kim, M.D.Los Angeles, CA 900331154360170
- Eu Meng Law, M.D.Los Angeles, CA 900331952366833
- Carlos Leiva Salinas, M.D.Los Angeles, CA 900331477978534
- Alexander Lerner, M.D.Los Angeles, CA 900331073785473
- Chia-Shang Liu, MD, PHDLos Angeles, CA 900331891851325
Common questions
What is Mark Susumu Shiroishi, M.D.'s NPI number?
Mark Susumu Shiroishi, M.D.'s National Provider Identifier (NPI) is 1699949875, issued on Apr 17, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Mark Susumu Shiroishi, M.D. located?
The NPPES record lists a practice address at 1500 San Pablo St FL 2, Los Angeles, CA, 90033. Phone: (323) 442-8541. Providers update this record themselves, so call before visiting.
How can I verify Mark Susumu Shiroishi, M.D.'s license?
NPPES lists California license number A84958, as entered by the provider. 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.