Catherine Sabu Thomas, M.D.
NPI 1295785756ActiveIndividual· Internal Medicine· St Charles, IL
Internal Medicine (M.D.) with Central Dupage Physician Group and 1 other group, practicing in St Charles, Illinois. Their prescriptions cost Medicare Part D more than their services did: $976,022 for 11,295 claims, against $243,071 paid for services in 2024. Lists Northwestern Medicine Central Dupage Hospital and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1295785756 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 12, 2006 |
| Last updated in NPPES | Jul 30, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 036-091979 | 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 - Internal Medicine (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 611 |
|---|---|
| Services billed | 3,433 across 53 procedure codes |
| Paid by Medicare | $243,071 |
Part D prescriptions in 2024
| Prescriptions (claims) | 11,295 · 25,172 30-day fills |
|---|---|
| Patients | 854 |
| Total drug cost | $976,022 |
| Generic share | 87% of claims |
Education and affiliations
| Graduation year | 1989 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- Central Dupage Physician GroupGeneva, IL · 1,080 clinicians
- Dynamic Physical Therapy, Inc.Oak Park, IL · 43 clinicians
Hospital affiliations
- Northwestern Medicine Central Dupage HospitalWinfield, IL
- Northwestern Medicine Delnor Community HospitalGeneva, IL
- Northwestern Medicine Kishwaukee HospitalDekalb, IL
- Northwestern Medicine McHenryMcHenry, IL
Other facilities
- Absolute Home WellnessHome health agency · Saint Charles, IL
- Astra Health WestHome health agency · Elgin, IL
- Covenantcare at HomeHome health agency · Saint Charles, IL
- Dmj Home Health Services, IncHome health agency · Aurora, IL
- Resilience Home Health, LLCHome health agency · Aurora, 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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All 16 internal medicine physicians in St Charles · All internal medicine physicians in Illinois