Mark Wayne Williams Sr., MD, PHD
NPI 1417986001ActiveIndividual· Surgery· Muscatine, IA
Surgery (MD, PHD) in Muscatine, Iowa, trained at University of North Carolina at Chapel Hill School of Medicine (class of 2000). 102 Medicare patients in 2024, $29,490 paid; nearly all of their 89 Part D prescriptions were generic (90%). Organogenesis Inc. reported $96.22 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1417986001 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD, PHD |
| Sole proprietor | Yes |
| NPI issued | Jul 3, 2006 |
| Last updated in NPPES | Nov 14, 2025 |
| Certified by provider | Nov 14, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Surgery Primary | 208600000X | 49587 | IA |
| Surgery | 208600000X | TL25609 | SC |
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 - General Surgery (IA); Practitioner - General Surgery (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 102 |
|---|---|
| Services billed | 175 across 54 procedure codes |
| Paid by Medicare | $29,490 |
Part D prescriptions in 2024
| Prescriptions (claims) | 89 · 91 30-day fills |
|---|---|
| Patients | 72 |
| Total drug cost | $975.03 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | University of North Carolina at Chapel Hill School of Medicine |
|---|---|
| Graduation year | 2000 |
| Medicare specialty | General Surgery |
Medical group
- Unity HealthcareMuscatine, IA · 67 clinicians
Hospital affiliations
- Trinity MuscatineMuscatine, IA
- Trinity Rock IslandRock Island, IL
Other facilities
- Unity Point at HomeHome health agency · Moline, IL
Industry payments (Open Payments)
- 2025$96.22 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Organogenesis Inc. | $96.22 | 1 |
What the 2025 payments were for
- Food and Beverage$96.22 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Surgery providers in Muscatine
- 1912993965