Thomas Mark
NPI 1255577649ActiveIndividual· Physician Assistant· Elgin, IL
Physician Assistant with Prime Healthcare Illinois Medical Group LLC, practicing in Elgin, Illinois. Their prescriptions cost Medicare Part D more than their services did: $348,571 for 5,564 claims, against $52,152 paid for services in 2024. Lists Presence Mercy Medical Center and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1255577649 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Sole proprietor | No |
| NPI issued | Jan 6, 2009 |
| Last updated in NPPES | Jan 6, 2009 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | 085003372 | IL |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Physician Assistant (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 360 |
|---|---|
| Services billed | 763 across 31 procedure codes |
| Paid by Medicare | $52,152 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,564 · 11,154 30-day fills |
|---|---|
| Patients | 677 |
| Total drug cost | $348,571 |
| Generic share | 84% of claims |
Education and affiliations
| Graduation year | 2008 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- Prime Healthcare Illinois Medical Group LLCChicago, IL · 322 clinicians
Hospital affiliations
- Presence Mercy Medical CenterAurora, IL
- Presence Saints Mary and Elizabeth Medical CenterChicago, IL
- Riverside Medical CenterKankakee, IL
- Saint Joseph Medical CenterJoliet, IL
- Silver Cross Hospital and Medical CentersNew Lenox, IL
Other facilities
- Newsome Home Health Care & Purpose Care of Illinois - JolietHome health agency · Joliet, IL
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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