Robert Arthur Bonner, M.D.
NPI 1497862684ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Riverside, CA
Internal Medicine, Endocrinology, Diabetes & Metabolism (M.D.) in Riverside, California, trained at University of Minnesota Medical School (class of 1973). Their prescriptions cost Medicare Part D more than their services did: $2,819,868 for 5,756 claims, against $20,181 paid for services in 2024. Abbott Laboratories was the largest of 4 companies reporting payments in 2025, $214.29 in all, mostly food and beverage.
Overview
| NPI | 1497862684 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Aug 24, 2006 |
| Last updated in NPPES | Oct 16, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | G60851 | CA |
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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 84 |
|---|---|
| Services billed | 225 across 2 procedure codes |
| Paid by Medicare | $20,181 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,756 · 12,694 30-day fills |
|---|---|
| Patients | 493 |
| Total drug cost | $2,819,868 |
| Generic share | 47% of claims |
Education and affiliations
| Medical school | University of Minnesota Medical School |
|---|---|
| Graduation year | 1973 |
| Medicare specialty | Internal Medicine |
| Secondary specialties | Endocrinology |
Industry payments (Open Payments)
- 2025$214.29 · 10 payments from 4 companies
- 2024$483.93 · 21 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbott Laboratories | $156.50 | 7 |
| Madrigal Pharmaceuticals | $23.94 | 1 |
| Novo Nordisk Inc | $18.01 | 1 |
| Dexcom, Inc. | $15.84 | 1 |
What the 2025 payments were for
- Food and Beverage$214.29 · 10 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other endocrinologists in Riverside
- 1093240178
- 1093894941
- 1548271166
- 1568428134
- 1649341553
- 1669856688
- 1629630652
- 1376984351
- 1740262674
- 1295419182
- 1881753549