Oleg F. Rubin, MD
NPI 1790762763ActiveIndividual· Internal Medicine, Nephrology· Fairfield, CA
Internal Medicine, Nephrology (MD) with Ong Rubin Shahmir A Medical Corporation, practicing in Fairfield, California. Their prescriptions cost Medicare Part D more than their services did: $541,419 for 2,499 claims, against $150,273 paid for services in 2024. Novartis Pharmaceuticals Corporation was the largest of 5 companies reporting payments in 2025, $370.94 in all, mostly food and beverage. Lists Northbay Medical Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1790762763 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Dec 29, 2005 |
| Last updated in NPPES | Nov 15, 2024 |
| Certified by provider | Nov 15, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | A81462 | CA |
| Internal Medicine | 207R00000X | A81462 | 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 | 346 |
|---|---|
| Services billed | 1,198 across 25 procedure codes |
| Paid by Medicare | $150,273 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,499 · 5,212 30-day fills |
|---|---|
| Patients | 227 |
| Total drug cost | $541,419 |
| Generic share | 81% 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 Delta View DialysisDialysis facility · Pittsburg, CA
- Davita Fairfield Dialysis CenterDialysis facility · Fairfield, CA
- Davita Fairfield Downtown DialysisDialysis facility · Fairfield, CA
- Davita Sunflower Home TrainingDialysis facility · Fairfield, CA
Industry payments (Open Payments)
- 2025$370.94 · 10 payments from 5 companies
- 2024$293.77 · 13 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $205.37 | 3 |
| Otsuka America Pharmaceutical, Inc. | $59.81 | 2 |
| Amgen Inc. | $52.54 | 2 |
| Takeda Pharmaceuticals U.S.A., Inc. | $36.82 | 2 |
| Astrazeneca Pharmaceuticals LP | $16.40 | 1 |
What the 2025 payments were for
- Food and Beverage$370.94 · 10 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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