Quick answers
- Which hospitals does Thomas E. Klarquist work at?
- Medicare's official clinician data lists Thomas E. Klarquist at 1 hospital: Advocate Illinois Masonic Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Thomas E. Klarquist see patients?
- Medicare's clinician data lists 3 practice locations, including Buffalo Grove, IL and Chicago, IL. Call before your visit to confirm the address.
- What is Thomas E. Klarquist's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Thomas E. Klarquist accept Medicare assignment?
- Yes. Medicare's clinician data says Thomas E. Klarquist 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 E. Klarquist offer telehealth?
- Medicare's clinician data says Thomas E. Klarquist offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Thomas E. Klarquist?
- (847) 459-1160, as listed in official Medicare / NPI Registry data.
- What is Thomas E. Klarquist's NPI number?
- 1477517373. 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 E. Klarquist works
Medicare's Facility Affiliation Data lists Thomas E. Klarquist at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Advocate Illinois Masonic Medical CenterChicago, IL · Acute Care Hospital · CCN 140182
Practice locations
Addresses where Thomas E. Klarquist is enrolled with Medicare (CMS data updated 2026-10-02).
- 214 McHenry RdBuffalo Grove, IL 60089 (847) 459‑1160
- 3134 N Clark StChicago, IL 60657 (773) 296‑5420
- 3936 N Milwaukee AveChicago, IL 60641 (773) 736‑6125
Group practices
Medicare enrollment lists Thomas E. Klarquist as a member of this group (CMS data updated 2026-10-02).
- Advocate Health and Hospitals Corporation3,118 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Buffalo Grove
Clinicians with the same Medicare primary specialty in Buffalo Grove, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Michigan State University College Of Human Medicine |
| Graduation year | 1987 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1477517373 |
| 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