Irvin Chi-Yang Lien, MD
NPI 1124654272ActiveIndividual· Hospitalist· Redwood City, CA
Hospitalist (MD) in Redwood City, California, licensed in CA, with an NPI issued in March 2020. Their prescriptions cost Medicare Part D more than their services did: $29,211 for 513 claims, against $3,138 paid for services in 2024. Genzyme Corporation was the largest of 6 companies reporting payments in 2025, $246.31 in all, mostly food and beverage.
Overview
| NPI | 1124654272 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Mar 20, 2020 |
| Last updated in NPPES | Jul 2, 2023 |
| Certified by provider | Jul 2, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Hospitalist Primary | 208M00000X | A180133 | 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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 23 |
|---|---|
| Services billed | 37 across 8 procedure codes |
| Paid by Medicare | $3,138 |
Part D prescriptions in 2024
| Prescriptions (claims) | 513 · 961 30-day fills |
|---|---|
| Patients | 175 |
| Total drug cost | $29,211 |
| Generic share | 88% of claims |
Industry payments (Open Payments)
- 2025$246.31 · 6 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genzyme Corporation | $115.42 | 1 |
| Erbe USA Inc | $40.00 | 1 |
| Actelion Pharmaceuticals US, Inc. | $33.01 | 1 |
| Baxter Healthcare | $23.83 | 1 |
| Astrazeneca Pharmaceuticals LP | $19.84 | 1 |
What the 2025 payments were for
- Food and Beverage$246.31 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other hospitalists in Redwood City
- 1801281795
- 1124030614
- 1245242155
- 1245508159
- 1255417770
- 1255419842
- 1437611522
- 1477631018
- 1710059563
- 1851479497
- 1417035072
- 1508878471
All 25 hospitalists in Redwood City · All hospitalists in California