Ron Y. Gu, MD
NPI 1851494215ActiveIndividual· Internal Medicine· Hacienda Heights, CA
Internal Medicine (MD) in Hacienda Heights, California, trained at National Medical University (class of 1968). Their prescriptions cost Medicare Part D more than their services did: $19,518 for 228 claims, against $7,073 paid for services in 2024. Amgen Inc. was the largest of 6 companies reporting payments in 2025, $346.82 in all, mostly food and beverage.
Overview
| NPI | 1851494215 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Sep 7, 2006 |
| Last updated in NPPES | Jul 8, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A37924 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 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 | 35 |
|---|---|
| Services billed | 114 across 11 procedure codes |
| Paid by Medicare | $7,073 |
Part D prescriptions in 2024
| Prescriptions (claims) | 228 · 484 30-day fills |
|---|---|
| Patients | 83 |
| Total drug cost | $19,518 |
| Generic share | 71% of claims |
Education and affiliations
| Medical school | National Medical University |
|---|---|
| Graduation year | 1968 |
| Medicare specialty | Internal Medicine |
Medical group
- Colima Medical Clinic PCHacienda Heights, CA · 5 clinicians
Industry payments (Open Payments)
- 2025$346.82 · 10 payments from 6 companies
- 2024$295.79 · 12 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $186.98 | 3 |
| Glaxosmithkline, LLC. | $47.84 | 2 |
| Astrazeneca Pharmaceuticals LP | $44.85 | 2 |
| Sanofi Pasteur Inc. | $26.13 | 1 |
| Novo Nordisk Inc | $21.91 | 1 |
What the 2025 payments were for
- Food and Beverage$346.82 · 10 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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