Mark Jack Der Mesropian, D.O.
NPI 1124309349ActiveIndividual· Anesthesiology· Long Branch, NJ
Anesthesiology (D.O.) with Rwjbh Observation Associates LLC, practicing in Long Branch, New Jersey. Medicare paid $35,159 for services to 161 patients in 2024. Merck Sharp & Dohme LLC reported $18.26 in payments in 2025, mostly food and beverage. Lists Monmouth Medical Center as a hospital affiliation.
Overview
| NPI | 1124309349 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | Yes |
| NPI issued | Sep 1, 2011 |
| Last updated in NPPES | Jan 23, 2023 |
| Certified by provider | Jan 23, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Anesthesiology Primary | 207L00000X | 25MB10061600 | NJ |
| Anesthesiology | 207L00000X | 051857 | CT |
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 - Anesthesiology (NJ); Practitioner - Anesthesiology (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 161 |
|---|---|
| Services billed | 203 across 59 procedure codes |
| Paid by Medicare | $35,159 |
Education and affiliations
| Graduation year | 2009 |
|---|---|
| Medicare specialty | Anesthesiology |
Medical group
- Rwjbh Observation Associates LLCJersey City, NJ · 1,008 clinicians
Hospital affiliation
- Monmouth Medical CenterLong Branch, NJ
Industry payments (Open Payments)
- 2025$18.26 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $18.26 | 1 |
What the 2025 payments were for
- Food and Beverage$18.26 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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