William Cavanaugh Chapman, MD
NPI 1790703270ActiveIndividual· Transplant Surgery· Saint Louis, MO
Transplant Surgery (MD) in Saint Louis, Missouri, trained at Medical University of South Carolina College of Medicine (class of 1984). Their prescriptions cost Medicare Part D more than their services did: $223,892 for 1,368 claims, against $89,801 paid for services in 2024. Organox Ltd was the largest of 3 companies reporting payments in 2025, $6,925 in all, mostly honoraria.
Overview
| NPI | 1790703270 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 17, 2006 |
| Last updated in NPPES | Apr 15, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Transplant Surgery Primary | 204F00000X | 2002007882 | MO |
| Surgery, Surgical Critical Care | 2086S0102X | 2002007882 | MO |
| Surgery, Surgical Oncology | 2086X0206X | 2002007882 | MO |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - General Surgery (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 59 |
|---|---|
| Services billed | 176 across 36 procedure codes |
| Paid by Medicare | $89,801 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,368 · 1,541 30-day fills |
|---|---|
| Patients | 134 |
| Total drug cost | $223,892 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | Medical University of South Carolina College of Medicine |
|---|---|
| Graduation year | 1984 |
| Medicare specialty | General Surgery |
Medical group
- Washington UniversitySaint Louis, MO · 3,029 clinicians
Hospital affiliations
- Barnes Jewish HospitalSaint Louis, MO
- Barnes-Jewish West County HospitalCreve Coeur, MO
- Missouri Baptist Medical CenterSaint Louis, MO
- Progress West HospitalOfallon, MO
Other facilities
- Bjc Home Care ServicesHome health agency · Saint Louis, MO
Industry payments (Open Payments)
- 2025$6,925 · 10 payments from 3 companies
- 2024$65.67 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Organox Ltd | $6,653 | 8 |
| Medtronic, Inc. | $156.25 | 1 |
| Intuitive Surgical, Inc. | $115.41 | 1 |
What the 2025 payments were for
- Honoraria$5,769 · 1 payment
- Food and Beverage$647.14 · 6 payments
- Travel and Lodging$508.26 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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