David Staff, M.D.
NPI 1386619427ActiveIndividual· Internal Medicine, Gastroenterology· Milwaukee, WI
Internal Medicine, Gastroenterology (M.D.) in Milwaukee, Wisconsin, trained at Medical College of Wisconsin (class of 1991). Their prescriptions cost Medicare Part D more than their services did: $531,589 for 2,091 claims, against $74,027 paid for services in 2024. Gilead Sciences, Inc. reported $64.18 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1386619427 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Feb 22, 2006 |
| Last updated in NPPES | Jan 26, 2026 |
| Certified by provider | Jan 26, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 33572-20 | WI |
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 - Gastroenterology (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 417 |
|---|---|
| Services billed | 751 across 49 procedure codes |
| Paid by Medicare | $74,027 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,091 · 3,941 30-day fills |
|---|---|
| Patients | 760 |
| Total drug cost | $531,589 |
| Generic share | 80% of claims |
Education and affiliations
| Medical school | Medical College of Wisconsin |
|---|---|
| Graduation year | 1991 |
| Medicare specialty | Gastroenterology |
Medical groups
- Gi Associates LLCMilwaukee, WI · 55 clinicians
- Gastroenterology Specialists SCWauwatosa, WI · 30 clinicians
Hospital affiliations
- Oconomowoc Memorial HospitalOconomowoc, WI
- Waukesha Memorial HospitalWaukesha, WI
Industry payments (Open Payments)
- 2025$64.18 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Gilead Sciences, Inc. | $64.18 | 2 |
What the 2025 payments were for
- Food and Beverage$64.18 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Gastroenterology providers in Milwaukee
- 1457402307
- 1730608324
- 1770544843
- 1801863501
- 1134231178
- 1275211567
- 1003891250
- 1407134422
- 1306341904
- 1457387896
- 1104079177
- 1467499277
All Internal Medicine, Gastroenterology providers in Wisconsin →