Ashley Jillian Williamson, M.D.
NPI 1548640386ActiveIndividual· Surgery, Vascular Surgery· Chicago, IL
Surgery, Vascular Surgery (M.D.) with University of Chicago and 1 other group, practicing in Chicago, Illinois. Medicare paid $11,847 for services to 120 patients in 2024. Intuitive Surgical, Inc. was the largest of 6 companies reporting payments in 2025, $10,865 in all, mostly education. Lists Ingalls Memorial Hospital and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1548640386 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jun 7, 2015 |
| Last updated in NPPES | Jun 5, 2025 |
| Certified by provider | Jun 5, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Surgery, Vascular Surgery Primary | 2086S0129X | 036143888 | IL |
| Surgery | 208600000X | 125066659 | IL |
| Surgery, Vascular Surgery | 2086S0129X | 01094916A | IN |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Vascular Surgery (IL); Practitioner - Vascular Surgery (IN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 120 |
|---|---|
| Services billed | 160 across 31 procedure codes |
| Paid by Medicare | $11,847 |
Education and affiliations
| Graduation year | 2015 |
|---|---|
| Medicare specialty | Vascular Surgery |
Medical groups
- University of ChicagoChicago, IL · 1,712 clinicians
- The University of Chicago Medical CenterChicago, IL · 915 clinicians
Hospital affiliations
- Ingalls Memorial HospitalHarvey, IL
- St Mary Medical Center IncHobart, IN
- The University of Chicago Medical CenterChicago, IL
- Uchicago Medicine Northwest IndianaCrown Point, IN
Other facilities
- Enhabit Home HealthHome health agency · Schererville, IN
Industry payments (Open Payments)
- 2025$10,865 · 17 payments from 6 companies
- 2024$7,296 · 21 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Intuitive Surgical, Inc. | $10,003 | 9 |
| W. L. Gore & Associates, Inc. | $222.71 | 2 |
| Baxter Healthcare | $220.40 | 2 |
| Becton, Dickinson and Company | $171.81 | 1 |
| Boston Scientific Corporation | $130.97 | 1 |
What the 2025 payments were for
- Education$8,600 · 2 payments
- Travel and Lodging$1,309 · 6 payments
- Food and Beverage$955.76 · 9 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 59 vascular surgeons in Chicago · All vascular surgeons in Illinois