Steven Huy Ong, MD
NPI 1225006349ActiveIndividual· Internal Medicine, Nephrology· Fairfield, CA
Internal Medicine, Nephrology (MD) with Ong Rubin Shahmir A Medical Corporation, practicing in Fairfield, California. 393 Medicare patients in 2024, $206,732 paid; nearly all of their 956 Part D prescriptions were generic (96%). Amgen Inc. was the largest of 5 companies reporting payments in 2025, $473.71 in all, mostly food and beverage. Lists Northbay Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1225006349 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 14, 2006 |
| Last updated in NPPES | Nov 12, 2024 |
| Certified by provider | Nov 12, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | A90786 | 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 - Nephrology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 393 |
|---|---|
| Services billed | 1,604 across 27 procedure codes |
| Paid by Medicare | $206,732 |
Part D prescriptions in 2024
| Prescriptions (claims) | 956 · 2,208 30-day fills |
|---|---|
| Patients | 158 |
| Total drug cost | $66,454 |
| Generic share | 96% of claims |
Education and affiliations
| Graduation year | 2000 |
|---|---|
| Medicare specialty | Nephrology |
Medical group
- Ong Rubin Shahmir A Medical CorporationFairfield, CA · 6 clinicians
Hospital affiliations
- Northbay Medical CenterFairfield, CA
- Sutter Medical Center, SacramentoSacramento, CA
Other facilities
- Davita Concord Dialysis CenterDialysis facility · Concord, CA
- Davita Fairfield Dialysis CenterDialysis facility · Fairfield, CA
- Davita Fairfield Downtown DialysisDialysis facility · Fairfield, CA
- Davita Sunflower Home TrainingDialysis facility · Fairfield, CA
- Davita Vaca Valley Home TrainingDialysis facility · Vacaville, CA
Industry payments (Open Payments)
- 2025$473.71 · 13 payments from 5 companies
- 2024$683.57 · 20 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $189.07 | 5 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $135.24 | 2 |
| Bayer Healthcare Pharmaceuticals Inc. | $102.42 | 4 |
| Travere Therapeutics, Inc. | $24.20 | 1 |
| Astrazeneca Pharmaceuticals LP | $22.78 | 1 |
What the 2025 payments were for
- Food and Beverage$473.71 · 13 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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