Nancy Sun, M.D.
NPI 1821146051ActiveIndividual· Emergency Medicine· Simi Valley, CA
Emergency Medicine (M.D.) in Simi Valley, California, trained at George Washington University School of Medicine (class of 2000). 617 Medicare patients in 2024, $96,522 paid; nearly all of their 403 Part D prescriptions were generic (95%). Penumbra, Inc. reported $148.01 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1821146051 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jan 5, 2007 |
| Last updated in NPPES | Jan 28, 2020 |
| Certified by provider | Jan 28, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Emergency Medicine Primary | 207P00000X | A98171 | 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); Practitioner - Emergency Medicine (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 617 |
|---|---|
| Services billed | 1,421 across 29 procedure codes |
| Paid by Medicare | $96,522 |
Part D prescriptions in 2024
| Prescriptions (claims) | 403 · 421 30-day fills |
|---|---|
| Patients | 278 |
| Total drug cost | $6,817 |
| Generic share | 95% of claims |
Education and affiliations
| Medical school | George Washington University School of Medicine |
|---|---|
| Graduation year | 2000 |
| Medicare specialty | Emergency Medicine |
Medical groups
- Shannon ClinicSan Angelo, TX · 559 clinicians
- Allied Emergency Physicians, Inc.Simi Valley, CA · 15 clinicians
Hospital affiliations
- Adventist Health Simi ValleySimi Valley, CA
- Sutter Delta Medical CenterAntioch, CA
Industry payments (Open Payments)
- 2025$148.01 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Penumbra, Inc. | $148.01 | 1 |
What the 2025 payments were for
- Food and Beverage$148.01 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 15 emergency medicine physicians in Simi Valley · All emergency medicine physicians in California