Clark L. Williams, MD
NPI 1710911417ActiveIndividual· Emergency Medicine· Lancaster, WI
Emergency Medicine (MD) in Lancaster, Wisconsin, trained at University of Wisconsin School of Medicine (class of 1999). 32 Medicare patients in 2024, $3,608 paid; nearly all of their 206 Part D prescriptions were generic (92%).
Overview
| NPI | 1710911417 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 10, 2006 |
| Last updated in NPPES | Sep 3, 2024 |
| Certified by provider | Sep 3, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Emergency Medicine Primary | 207P00000X | 42618 | WI |
| Emergency Medicine | 207P00000X | 37010 | IA |
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 - Emergency Medicine (IA); Practitioner - Emergency Medicine (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 32 |
|---|---|
| Services billed | 58 across 14 procedure codes |
| Paid by Medicare | $3,608 |
Part D prescriptions in 2024
| Prescriptions (claims) | 206 · 227 30-day fills |
|---|---|
| Patients | 127 |
| Total drug cost | $2,730 |
| Generic share | 92% of claims |
Education and affiliations
| Medical school | University of Wisconsin School of Medicine |
|---|---|
| Graduation year | 1999 |
| Medicare specialty | Emergency Medicine |
Medical groups
- The Finley HospitalDubuque, IA · 84 clinicians
- Grant Regional Health Center IncLancaster, WI · 38 clinicians
- Central Community HospitalElkader, IA · 16 clinicians
Hospital affiliations
- Finley HospitalDubuque, IA
- Grant Regional Health CenterLancaster, WI
- Mercyone Elkader Medical CenterElkader, IA
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records