William Allen Cass, M.D.
NPI 1710041207ActiveIndividual· Anesthesiology· Columbia, MO
Anesthesiology (M.D.) with The Curators of the University of Missouri and 1 other group, practicing in Columbia, Missouri. Medicare paid $4,649 for services to 76 patients in 2024. Merck Sharp & Dohme LLC was the largest of 2 companies reporting payments in 2025, $55.81 in all, mostly food and beverage. Lists Boone Hospital Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1710041207 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Dec 20, 2006 |
| Last updated in NPPES | Jul 21, 2026 |
| Certified by provider | Jul 21, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Anesthesiology Primary | 207L00000X | 2005025929 | MO |
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 - Anesthesiology (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 76 |
|---|---|
| Services billed | 104 across 12 procedure codes |
| Paid by Medicare | $4,649 |
Education and affiliations
| Graduation year | 1989 |
|---|---|
| Medicare specialty | Anesthesiology |
Medical groups
- The Curators of the University of MissouriColumbia, MO · 1,131 clinicians
- Mid-America Anesthesia Consultants PCColumbia, MO · 50 clinicians
Hospital affiliations
- Boone Hospital CenterColumbia, MO
- University of Missouri Health CareColumbia, MO
Industry payments (Open Payments)
- 2025$55.81 · 3 payments from 2 companies
- 2024$17.11 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $38.28 | 2 |
| Chiesi USA, Inc. | $17.53 | 1 |
What the 2025 payments were for
- Food and Beverage$55.81 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 133 anesthesiologists in Columbia · All anesthesiologists in Missouri