Leroy Stewart Thomson III, M.D.
NPI 1477651750ActiveIndividual· Anesthesiology· Barrington, IL
Anesthesiology (M.D.) with Barrington Anesthesia Associates, SC, practicing in Barrington, Illinois. Medicare paid $45,590 for services to 252 patients in 2024. Pacira Pharmaceuticals Incorporated was the largest of 2 companies reporting payments in 2025, $66.86 in all, mostly food and beverage. Lists Advocate Good Shepherd Hospital as a hospital affiliation.
Overview
| NPI | 1477651750 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Sep 20, 2006 |
| Last updated in NPPES | Dec 20, 2021 |
| Certified by provider | Dec 20, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Anesthesiology Primary | 207L00000X | 036.119201 | IL |
| Anesthesiology | 207L00000X | 35844 | AZ |
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 | 252 |
|---|---|
| Services billed | 292 across 58 procedure codes |
| Paid by Medicare | $45,590 |
Education and affiliations
| Graduation year | 2002 |
|---|---|
| Medicare specialty | Anesthesiology |
Medical group
- Barrington Anesthesia Associates, SCBarrington, IL · 20 clinicians
Hospital affiliation
- Advocate Good Shepherd HospitalBarrington, IL
Industry payments (Open Payments)
- 2025$66.86 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pacira Pharmaceuticals Incorporated | $35.16 | 1 |
| Merck Sharp & Dohme LLC | $31.70 | 1 |
What the 2025 payments were for
- Food and Beverage$66.86 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 29 anesthesiologists in Barrington · All anesthesiologists in Illinois