Adam M. Sun, MD
NPI 1497712715ActiveIndividual· Internal Medicine, Nephrology· Monterey Park, CA
Internal Medicine, Nephrology (MD) in Monterey Park, California, licensed in CA, with an NPI issued in April 2006. Their prescriptions cost Medicare Part D more than their services did: $1,249,835 for 3,524 claims, against $185,707 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 6 companies reporting payments in 2025, $655.75 in all, mostly food and beverage.
Overview
| NPI | 1497712715 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Apr 28, 2006 |
| Last updated in NPPES | Mar 25, 2020 |
| Certified by provider | Mar 25, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | C43035 | 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 | 248 |
|---|---|
| Services billed | 968 across 7 procedure codes |
| Paid by Medicare | $185,707 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,524 · 5,639 30-day fills |
|---|---|
| Patients | 299 |
| Total drug cost | $1,249,835 |
| Generic share | 59% of claims |
Education and affiliations
| Graduation year | 1984 |
|---|---|
| Medicare specialty | Nephrology |
Other facilities
- Rosemead Dialysis CenterDialysis facility · Rosemead, CA
- Usrc Rosemead DialysisDialysis facility · Rosemead, CA
Industry payments (Open Payments)
- 2025$655.75 · 33 payments from 6 companies
- 2024$772.37 · 41 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $325.71 | 22 |
| Akebia Therapeutics Inc | $176.40 | 3 |
| Bayer Healthcare Pharmaceuticals Inc. | $98.97 | 5 |
| Novartis Pharmaceuticals Corporation | $19.30 | 1 |
| Calliditas Therapeutics US Inc. | $18.70 | 1 |
What the 2025 payments were for
- Food and Beverage$655.75 · 33 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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