Mark Samir Salem
NPI 1821356254ActiveIndividual· Internal Medicine, Gastroenterology· Orange, CA
Internal Medicine, Gastroenterology in Orange, California, trained at University of Miami, Lm Miller School of Medicine (class of 2012). Their prescriptions cost Medicare Part D more than their services did: $1,047,468 for 180 claims, against $4,810 paid for services in 2024. Celltrion USA Inc. reported $2,950 in payments in 2025, mostly consulting fees.
Overview
| NPI | 1821356254 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Sole proprietor | Yes |
| NPI issued | Apr 23, 2012 |
| Last updated in NPPES | Feb 4, 2020 |
| Certified by provider | Feb 4, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | A127236 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 26 |
|---|---|
| Services billed | 66 across 7 procedure codes |
| Paid by Medicare | $4,810 |
Part D prescriptions in 2024
| Prescriptions (claims) | 180 · 278 30-day fills |
|---|---|
| Patients | 29 |
| Total drug cost | $1,047,468 |
| Generic share | 44% of claims |
Education and affiliations
| Medical school | University of Miami, Lm Miller School of Medicine |
|---|---|
| Graduation year | 2012 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Uc RegentsOrange, CA · 319 clinicians
Hospital affiliation
- Uci Health-OrangeOrange, CA
Industry payments (Open Payments)
- 2025$2,950 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Celltrion USA Inc. | $2,950 | 1 |
What the 2025 payments were for
- Consulting Fee$2,950 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 58 gastroenterologists in Orange · All gastroenterologists in California