Stephen J. Liu, M.D.
NPI 1083666259ActiveIndividual· Emergency Medicine· Los Angeles, CA
Emergency Medicine (M.D.) in Los Angeles, California, trained at University of North Carolina at Chapel Hill School of Medicine (class of 2002). 109 Medicare patients in 2024, $16,827 paid; nearly all of their 70 Part D prescriptions were generic (96%). Penumbra, Inc. reported $1,847 in payments in 2025, mostly travel and lodging.
Overview
| NPI | 1083666259 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 16, 2006 |
| Last updated in NPPES | Aug 25, 2009 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Emergency Medicine Primary | 207P00000X | A84304 | 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 - Emergency Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 109 |
|---|---|
| Services billed | 199 across 11 procedure codes |
| Paid by Medicare | $16,827 |
Part D prescriptions in 2024
| Prescriptions (claims) | 70 · 70 30-day fills |
|---|---|
| Patients | 48 |
| Total drug cost | $6,756 |
| Generic share | 96% of claims |
Education and affiliations
| Medical school | University of North Carolina at Chapel Hill School of Medicine |
|---|---|
| Graduation year | 2002 |
| Medicare specialty | Emergency Medicine |
Medical groups
- Ridgeline Emergency Physicians Medical Group, Inc.Glendale, CA · 41 clinicians
- Elite Hospitalist Medical Group IncLake Arrowhead, CA · 15 clinicians
Hospital affiliations
- Adventist Health White MemorialLos Angeles, CA
- Glendale Mem Hospital & Hlth CenterGlendale, CA
- Mountains Community HospitalLake Arrowhead, CA
Industry payments (Open Payments)
- 2025$1,847 · 6 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Penumbra, Inc. | $1,847 | 6 |
What the 2025 payments were for
- Travel and Lodging$1,186 · 4 payments
- Food and Beverage$661.60 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 668 emergency medicine physicians in Los Angeles · All emergency medicine physicians in California