Quick answers
- Which hospitals does Catherine S. Thomas work at?
- Medicare's official clinician data lists Catherine S. Thomas at 4 hospitals: Northwestern Medicine Central Dupage Hospital, Northwestern Medicine Delnor Community Hospital, Northwestern Medicine Kishwaukee Hospital and Northwestern Medicine McHenry. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Catherine S. Thomas see patients?
- Medicare's clinician data lists 2 practice locations, including Oak Park, IL and St Charles, IL. Call before your visit to confirm the address.
- What is Catherine S. Thomas's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Catherine S. Thomas accept Medicare assignment?
- Yes. Medicare's clinician data says Catherine S. Thomas accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does Catherine S. Thomas offer telehealth?
- Medicare's clinician data says Catherine S. Thomas offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Catherine S. Thomas?
- (630) 584-1959, as listed in official Medicare / NPI Registry data.
- What is Catherine S. Thomas's NPI number?
- 1295785756. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Catherine S. Thomas works
Medicare's Facility Affiliation Data lists Catherine S. Thomas at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Northwestern Medicine Central Dupage HospitalWinfield, IL · Acute Care Hospital · CCN 140242
- Northwestern Medicine Delnor Community HospitalGeneva, IL · Acute Care Hospital · CCN 140211
- Northwestern Medicine Kishwaukee HospitalDekalb, IL · Acute Care Hospital · CCN 140286
- Northwestern Medicine McHenryMcHenry, IL · Acute Care Hospital · CCN 140116
Practice locations
Addresses where Catherine S. Thomas is enrolled with Medicare (CMS data updated 2026-10-02).
- 1049 Lake St, Suite 201Oak Park, IL 60301
- 2570 Foxfield RdSt Charles, IL 60174 (630) 584‑1959
Group practices
Medicare enrollment lists Catherine S. Thomas as a member of these groups (CMS data updated 2026-10-02).
- Central Dupage Physician Group1,080 clinicians in the group
- Dynamic Physical Therapy, Inc.43 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Oak Park
Clinicians with the same Medicare primary specialty in Oak Park, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1989 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1295785756 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians