Mark Samir Salem
Gastroenterology Physician · Orange, CA
Mark Samir Salem is a gastroenterology physician with a practice address in Orange, California, and NPI 1821356254, issued on Apr 23, 2012. Check the license (California A127236, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark Samir Salem
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- A127236 CA
Self-reported in NPPES; status is on the state search - Practice location
- 101 The City Dr S Ste 400, Orange, CA 92868
- Phone
- (714) 456-7358
- Enumerated
- Apr 23, 2012
- Record last updated
- Feb 4, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20191022003243); accepts Medicare assignment
- Medical or professional school
- University Of Miami, Lm Miller School Of Medicine, 2012
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 101 The City Dr S Ste 400
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Joshua AbataStudent in an Organized Health Care Education/Training Program1437899697
- Mark Abdelnour, MDStudent in an Organized Health Care Education/Training Program1194527812
- Shant AbrhamianStudent in an Organized Health Care Education/Training Program1033911219
- Salam AllahwerdyStudent in an Organized Health Care Education/Training Program1124767470
- Lily Allison, MDStudent in an Organized Health Care Education/Training Program1063272441
- Charissa Alo, MDStudent in an Organized Health Care Education/Training Program1801699335
Verify Mark Samir Salem in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A127236Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
78% fewer Medicare Part D claims than the average gastroenterology physician in 2024
180 Medicare Part D claims for 29 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 56% of claims.
Most prescribed
- Stelara24 claims
- Rinvoq19 claims
- Colesevelam Hcl16 claims
- Sulfasalazine15 claims
- Prednisone12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- UC RegentsOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Samir Salem among 2,140 gastroenterology physician records in California
Mark Samir Salem is one of 2,140 gastroenterology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 77% of them.
- NPI issued2012 · 77% of these records are older, 20% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2012 · median 2002 among the 1,538 with a school on file
- Record last updated2020 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in California
There are 2,140 gastroenterology physician records in California.
All 2,140 in California → Every provider in Orange → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Alaa Abousaif, MDOrange, CA 928681235124108
- William Collins, MDOrange, CA 928681104892074
- Jessica Hung, M.D.Orange, CA 928681396786323
- William Karnes, MDOrange, CA 928681881652998
- James Lee, MDOrange, CA 928681750358735
- Robert Lee, M.D.Orange, CA 928681669583530
- John Lee, MDOrange, CA 928681487734521
- William Metzger, MDOrange, CA 928681629040308
Common questions
What is Mark Samir Salem's NPI number?
Mark Samir Salem's National Provider Identifier (NPI) is 1821356254, issued on Apr 23, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Mark Samir Salem located?
The NPPES record lists a practice address at 101 The City Dr S Ste 400, Orange, CA, 92868. Phone: (714) 456-7358. Providers update this record themselves, so call before visiting.
How can I verify Mark Samir Salem's license?
NPPES lists California license number A127236, 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.
How much does Mark Samir Salem prescribe under Medicare Part D?
In 2024, Mark Samir Salem had 180 Medicare Part D claims for 29 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
What is Mark Samir Salem's MIPS final score?
The 2023 MIPS final score is 100 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.