Quick answers
- Which hospitals does Thomas Dennison work at?
- Medicare's official clinician data lists Thomas Dennison at 2 hospitals: Northwestern Medicine Central Dupage Hospital and Northwestern Medicine Kishwaukee Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Thomas Dennison see patients?
- Medicare's clinician data lists 1 practice location in Sycamore, IL. Call before your visit to confirm the address.
- What is Thomas Dennison's specialty?
- Medicare lists Psychiatry as the primary specialty.
- Does Thomas Dennison accept Medicare assignment?
- Yes. Medicare's clinician data says Thomas Dennison 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 Thomas Dennison offer telehealth?
- Medicare's clinician data says Thomas Dennison offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Thomas Dennison?
- (630) 232-0280, as listed in official Medicare / NPI Registry data.
- What is Thomas Dennison's NPI number?
- 1588673719. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Thomas Dennison works
Medicare's Facility Affiliation Data lists Thomas Dennison 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 Kishwaukee HospitalDekalb, IL · Acute Care Hospital · CCN 140286
Practice locations
Addresses where Thomas Dennison is enrolled with Medicare (CMS data updated 2026-10-02).
- 1850 Gateway DrSycamore, IL 60178 (630) 232‑0280
Group practices
Medicare enrollment lists Thomas Dennison as a member of this group (CMS data updated 2026-10-02).
- Central Dupage Physician Group1,080 clinicians in the group
Specialties
- Psychiatryprimary
Other psychiatrists in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Illinois College Of Med (chi/peor/rock/chm-Urb) |
| Graduation year | 1981 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1588673719 |
| 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