Robert W. Nguyen, MD
NPI 1144256900ActiveIndividual· Internal Medicine· Colton, CA
Internal Medicine (MD) with Inpatient Specialists of California PC, practicing in Colton, California. Their prescriptions cost Medicare Part D more than their services did: $1,916,199 for 10,858 claims, against $63,909 paid for services in 2024. Novo Nordisk Inc was the largest of 2 companies reporting payments in 2025, $428.71 in all, mostly food and beverage. Lists St Bernardine Medical Center as a hospital affiliation.
Overview
| NPI | 1144256900 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 24, 2006 |
| Last updated in NPPES | Mar 31, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A93153 | 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 - General Practice (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 149 |
|---|---|
| Services billed | 502 across 8 procedure codes |
| Paid by Medicare | $63,909 |
Part D prescriptions in 2024
| Prescriptions (claims) | 10,858 · 21,097 30-day fills |
|---|---|
| Patients | 527 |
| Total drug cost | $1,916,199 |
| Generic share | 75% of claims |
Education and affiliations
| Graduation year | 2002 |
|---|---|
| Medicare specialty | General Practice |
Medical group
- Inpatient Specialists of California PCOakdale, CA · 385 clinicians
Hospital affiliation
- St Bernardine Medical CenterSan Bernardino, CA
Other facilities
- Destiny Home Health Agency, IncHome health agency · Moreno Valley, CA
Industry payments (Open Payments)
- 2025$428.71 · 21 payments from 2 companies
- 2024$285.41 · 15 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $260.28 | 13 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $168.43 | 8 |
What the 2025 payments were for
- Food and Beverage$428.71 · 21 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 71 internal medicine physicians in Colton · All internal medicine physicians in California