William D. Gaumer
NPI 1851817100ActiveIndividual· Physician Assistant· Evanston, IL
Physician Assistant in Evanston, Illinois, licensed in IL, with an NPI issued in August 2017. 41 Medicare patients in 2024, $1,867 paid; nearly all of their 81 Part D prescriptions were generic (94%).
Overview
| NPI | 1851817100 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Sole proprietor | No |
| NPI issued | Aug 18, 2017 |
| Last updated in NPPES | Mar 30, 2026 |
| Certified by provider | Mar 30, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | 085006292 | IL |
| Physician Assistant, Medical | 363AM0700X | 085.006292 | IL |
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 - Physician Assistant (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 41 |
|---|---|
| Services billed | 43 across 12 procedure codes |
| Paid by Medicare | $1,867 |
Part D prescriptions in 2024
| Prescriptions (claims) | 81 · 85 30-day fills |
|---|---|
| Patients | 62 |
| Total drug cost | $2,746 |
| Generic share | 94% of claims |
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 80 physician assistants in Evanston · All physician assistants in Illinois