Mark A. Nessim, M.D.
NPI 1780840488ActiveIndividual· Anesthesiology· Dekalb, IL
Anesthesiology (M.D.) with Anesthesia Associates, Ltd, practicing in Dekalb, Illinois. Medicare paid $25,075 for services to 202 patients in 2024. Merck Sharp & Dohme LLC reported $26.68 in payments in 2025, mostly food and beverage. Lists Presence Mercy Medical Center as a hospital affiliation.
Overview
| NPI | 1780840488 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Aug 1, 2008 |
| Last updated in NPPES | Aug 10, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Anesthesiology Primary | 207L00000X | 36.121278 | IL |
| Anesthesiology | 207L00000X | 336.082541 | IL |
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 (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 202 |
|---|---|
| Services billed | 215 across 38 procedure codes |
| Paid by Medicare | $25,075 |
Education and affiliations
| Graduation year | 2005 |
|---|---|
| Medicare specialty | Anesthesiology |
Medical group
- Anesthesia Associates, LtdDowners Grove, IL · 31 clinicians
Hospital affiliation
- Presence Mercy Medical CenterAurora, IL
Industry payments (Open Payments)
- 2025$26.68 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $26.68 | 1 |
What the 2025 payments were for
- Food and Beverage$26.68 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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