William John Bull Jr., MD
NPI 1417956947ActiveIndividual· Specialist· Naperville, IL
Specialist (MD) in Naperville, Illinois, licensed in IL, with an NPI issued in July 2005. Part D covered 51 prescriptions written in 2024, 88% of them generic. Abbvie Inc. was the largest of 4 companies reporting payments in 2025, $2,775 in all, mostly travel and lodging.
Overview
| NPI | 1417956947 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 18, 2005 |
| Last updated in NPPES | Sep 28, 2010 |
| Reactivated | Apr 5, 2006 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Specialist Primary | 174400000X | 036102621 | IL |
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) | Not in the public enrollment file of Oct 1, 2026 |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 51 · 51 30-day fills |
|---|---|
| Patients | 13 |
| Total drug cost | $176.41 |
| Generic share | 88% of claims |
Industry payments (Open Payments)
- 2025$2,775 · 24 payments from 4 companies
- 2024$351.27 · 9 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $2,700 | 21 |
| Merz North America, Inc. | $36.53 | 1 |
| Davol Inc. | $20.64 | 1 |
| Motiva USA, LLC | $17.95 | 1 |
What the 2025 payments were for
- Travel and Lodging$1,515 · 2 payments
- Food and Beverage$984.91 · 19 payments
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$274.70 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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