Tjoson Tjoa, M.D.
NPI 1235450958ActiveIndividual· Otolaryngology· Orange, CA
Otolaryngology (M.D.) with University Head and Neck Surgeons, practicing in Orange, California. 242 Medicare patients in 2024, $139,948 paid; nearly all of their 146 Part D prescriptions were generic (95%). Kls-Martin L.P. was the largest of 2 companies reporting payments in 2025, $243.10 in all, mostly food and beverage. Lists Uci Health-Orange as a hospital affiliation.
Overview
| NPI | 1235450958 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 16, 2010 |
| Last updated in NPPES | Jun 3, 2025 |
| Certified by provider | Jun 3, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Otolaryngology Primary | 207Y00000X | A119742 | CA |
| Otolaryngology, Plastic Surgery within the Head & Neck | 207YX0007X | 262971 | MA |
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 - Otolaryngology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 242 |
|---|---|
| Services billed | 883 across 94 procedure codes |
| Paid by Medicare | $139,948 |
Part D prescriptions in 2024
| Prescriptions (claims) | 146 · 200 30-day fills |
|---|---|
| Patients | 51 |
| Total drug cost | $5,387 |
| Generic share | 95% of claims |
Education and affiliations
| Graduation year | 2010 |
|---|---|
| Medicare specialty | Otolaryngology |
Medical group
- University Head and Neck SurgeonsOrange, CA · 27 clinicians
Hospital affiliation
- Uci Health-OrangeOrange, CA
Industry payments (Open Payments)
- 2025$243.10 · 3 payments from 2 companies
- 2024$233.94 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Kls-Martin L.P. | $213.05 | 2 |
| Atos Medical Inc | $30.05 | 1 |
What the 2025 payments were for
- Food and Beverage$243.10 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 33 otolaryngologists in Orange · All otolaryngologists in California