Tiffany Si-Ya Sun, PA-C
NPI 1124582259ActiveIndividual· Physician Assistant, Surgical· Philadelphia, PA
Physician Assistant, Surgical (PA-C) with University of Penn - Medical Group, practicing in Philadelphia, Pennsylvania. Their prescriptions cost Medicare Part D more than their services did: $21,009 for 233 claims, against $2,753 paid for services in 2024. Kestra Medical Technology Services, Inc. was the largest of 3 companies reporting payments in 2025, $266.68 in all, mostly food and beverage. Lists Hospital of Univ of Pennsylvania as a hospital affiliation.
Overview
| NPI | 1124582259 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | No |
| NPI issued | Jan 23, 2019 |
| Last updated in NPPES | Jan 23, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant, Surgical Primary | 363AS0400X | MA060257 | PA |
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 - Physician Assistant (PA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 33 |
|---|---|
| Services billed | 45 across 7 procedure codes |
| Paid by Medicare | $2,753 |
Part D prescriptions in 2024
| Prescriptions (claims) | 233 · 276 30-day fills |
|---|---|
| Patients | 90 |
| Total drug cost | $21,009 |
| Generic share | 86% of claims |
Education and affiliations
| Graduation year | 2018 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- University of Penn - Medical GroupPhiladelphia, PA · 3,505 clinicians
Hospital affiliation
- Hospital of Univ of PennsylvaniaPhiladelphia, PA
Industry payments (Open Payments)
- 2025$266.68 · 11 payments from 3 companies
- 2024$105.53 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Kestra Medical Technology Services, Inc. | $139.46 | 6 |
| Zoll Services LLC (A/K/A Zoll Lifecor Corp) | $98.80 | 4 |
| Philips North America LLC | $28.42 | 1 |
What the 2025 payments were for
- Food and Beverage$266.68 · 11 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 101 surgical physician assistants in Philadelphia · All surgical physician assistants in Pennsylvania