Thomas Klis
Student in an Organized Health Care Education/Training Program
836 W Wellington Ave
Chicago, IL 60657
Who else practices at this address →
Cook County includes primary care (3% of residents) and mental health (4% of residents) shortage areas. About shortage areas
- Medicare participating
At a glance
- Medical school
- University of Toledo College of Medicine (2017)
- Years since graduation
- 9
- In the NPI registry since
- 2017
- Medicare patients seen, 2024
- 386
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. What an NPI is
Education and training
- 2017Medical school: University of Toledo College of Medicine
- 2017Registered with an NPI (national billing number; not a license date)
Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
- Student in an Organized Health Care Education/Training Program primary
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Medical groups
- Dermatology Associates of Lagrange Sc (19 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 386
- Services billed
- 2,652
- Patients’ average age
- 75
| Service | Times | Patients |
|---|---|---|
| Destruction of precancer skin growth, 2-14 growths | 713 | 106 |
| Established patient office or other outpatient visit, 30-39 minutes | 277 | 202 |
| Destruction of precancer skin growth, 1 growth | 185 | 136 |
| Established patient office or other outpatient visit, 20-29 minutes | 161 | 133 |
| Destruction of skin growth, 1-14 growths | 140 | 116 |
| New patient office or other outpatient visit, 45-59 minutes | 102 | 102 |
| New patient office or other outpatient visit, 30-44 minutes | 67 | 67 |
| Biopsy of related skin growth, first growth | 65 | 60 |
| Destruction of precancer skin growth, 15 or more growths | 26 | 22 |
| Removal of skin tag, 1-15 skin tags | 14 | 14 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 17 companies reported 133 payments worth $2,427 in total to this clinician.
| Food and Beverage | $2,327 |
|---|---|
| Education | $99.99 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Janssen Biotech, Inc. Apr 7, 2025 | Education TREMFYA · Immunology · in-kind | $99.99 |
Each payment as the company reported it, with the products it named. Meals are counted in the totals above but not listed one by one.
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.