Jason Buddika Samarasena, M.D.
NPI 1629253364ActiveIndividual· Internal Medicine, Gastroenterology· Orange, CA
Internal Medicine, Gastroenterology (M.D.) with Uc Regents, practicing in Orange, California. In 2024 Medicare paid $114,570 for 393 patients, and Part D covered 431 of their prescriptions, 84% of them generic. Olympus Corporation of the Americas was the largest of 14 companies reporting payments in 2025, $120,664 in all, mostly consulting fees. Lists Uci Health-Orange as a hospital affiliation.
Overview
| NPI | 1629253364 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Dec 31, 2007 |
| Last updated in NPPES | Jan 24, 2025 |
| Certified by provider | Jan 24, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | A100124 | CA |
| Internal Medicine | 207R00000X | A100124 | 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 | 393 |
|---|---|
| Services billed | 839 across 60 procedure codes |
| Paid by Medicare | $114,570 |
Part D prescriptions in 2024
| Prescriptions (claims) | 431 · 755 30-day fills |
|---|---|
| Patients | 240 |
| Total drug cost | $44,846 |
| Generic share | 84% of claims |
Education and affiliations
| Graduation year | 2005 |
|---|---|
| Medicare specialty | Internal Medicine |
| Secondary specialties | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Uc RegentsOrange, CA · 319 clinicians
Hospital affiliation
- Uci Health-OrangeOrange, CA
Industry payments (Open Payments)
- 2025$120,664 · 115 payments from 14 companies
- 2024$59,004 · 92 payments from 19 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Olympus Corporation of the Americas | $53,849 | 52 |
| Olympus Corporation | $20,587 | 10 |
| Olympus America Inc. | $19,318 | 22 |
| Boston Scientific Corporation | $13,759 | 8 |
| Cook Incorporated | $4,520 | 3 |
What the 2025 payments were for
- Consulting Fee$50,421 · 19 payments
- Education$48,743 · 21 payments
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$12,015 · 6 payments
- Travel and Lodging$6,819 · 26 payments
- Food and Beverage$2,666 · 43 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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