Dr. Jeffrey L. Williamson, MD
General Surgery (Surgery Physician)
At a glance
- In the NPI registry since
- 2005
Licensed in Illinois since 1983, according to the Illinois Department of Financial and Professional Regulation. We show license dates only for the states that publish them in bulk; see which states do. For other states, check the state medical board.
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. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 2005Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Medicare’s Care Compare data doesn’t list this clinician’s medical school. 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
-
Surgery Physician primary
IL license 036066240 (first issued 1983; not renewed)
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Medicare patients and services
| Service | Times | Patients |
|---|---|---|
| New patient office or other outpatient visit, 45-59 minutes | 18 | 18 |
| Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional | 15 | 13 |
| New patient office or other outpatient visit, 15-29 minutes | 15 | 15 |
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.
Payments from drug and device companies
In 2025, 1 companies reported 1 payments worth $26.72 in total to this clinician.
| Ferring Pharmaceuticals Inc. | $26.72 |
|---|
| Food and Beverage | $26.72 |
|---|
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.