Tong Sun, MD
NPI 1629161336ActiveIndividual· Internal Medicine, Nephrology· Modesto, CA
Internal Medicine, Nephrology (MD) with Golden Valley Health Centers and 1 other group, practicing in Modesto, California. In 2024 Medicare paid $376,170 for 662 patients, and Part D covered 6,711 of their prescriptions, 86% of them generic. Bayer Healthcare Pharmaceuticals Inc. was the largest of 14 companies reporting payments in 2025, $725.31 in all, mostly food and beverage. Lists Adventist Health Sonora and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1629161336 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Oct 2, 2006 |
| Last updated in NPPES | Feb 22, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | A97313 | 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 - Nephrology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 662 |
|---|---|
| Services billed | 3,574 across 17 procedure codes |
| Paid by Medicare | $376,170 |
Part D prescriptions in 2024
| Prescriptions (claims) | 6,711 · 15,807 30-day fills |
|---|---|
| Patients | 725 |
| Total drug cost | $458,531 |
| Generic share | 86% of claims |
Education and affiliations
| Graduation year | 1991 |
|---|---|
| Medicare specialty | Nephrology |
| Telehealth | Offers telehealth |
Medical groups
- Golden Valley Health CentersDos Palos, CA · 113 clinicians
- Modesto Kidney Medical GroupModesto, CA · 5 clinicians
Hospital affiliations
- Adventist Health SonoraSonora, CA
- Doctors Medical CenterModesto, CA
- Emanuel Medical CenterTurlock, CA
- Memorial Medical CenterModesto, CA
- Oak Valley Hospital DistrictOakdale, CA
Other facilities
- Shc TurlockDialysis facility · Turlock, CA
- Usrc Modesto DialysisDialysis facility · Modesto, CA
- Usrc ParkwayDialysis facility · Modesto, CA
- Usrc Patterson DialysisDialysis facility · Patterson, CA
Industry payments (Open Payments)
- 2025$725.31 · 32 payments from 14 companies
- 2024$812.20 · 53 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Bayer Healthcare Pharmaceuticals Inc. | $96.12 | 4 |
| Amgen Inc. | $90.20 | 5 |
| Otsuka America Pharmaceutical, Inc. | $88.73 | 3 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $86.73 | 4 |
| Calliditas Therapeutics US Inc. | $80.87 | 3 |
What the 2025 payments were for
- Food and Beverage$725.31 · 32 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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