Lillian Y. Choi, MD
NPI 1790769818ActiveIndividual· Internal Medicine, Gastroenterology· Merced, CA
Internal Medicine, Gastroenterology (MD) in Merced, California, trained at University of Colorado School of Medicine, Denver (class of 1998). In 2024 Medicare paid $29,965 for 80 patients, and Part D covered 122 of their prescriptions, 70% of them generic. Salix Pharmaceuticals, A Division of Bausch Health US, LLC was the largest of 2 companies reporting payments in 2025, $226.98 in all, mostly food and beverage.
Overview
| NPI | 1790769818 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Dec 1, 2005 |
| Last updated in NPPES | Mar 24, 2022 |
| Certified by provider | Mar 24, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | A70839 | CA |
| Internal Medicine, Gastroenterology | 207RG0100X | 30991 | AZ |
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 - Gastroenterology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 80 |
|---|---|
| Services billed | 230 across 12 procedure codes |
| Paid by Medicare | $29,965 |
Part D prescriptions in 2024
| Prescriptions (claims) | 122 · 180 30-day fills |
|---|---|
| Patients | 67 |
| Total drug cost | $37,401 |
| Generic share | 70% of claims |
Education and affiliations
| Medical school | University of Colorado School of Medicine, Denver |
|---|---|
| Graduation year | 1998 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
Industry payments (Open Payments)
- 2025$226.98 · 7 payments from 2 companies
- 2024$134.29 · 6 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $206.32 | 6 |
| Celltrion USA Inc. | $20.66 | 1 |
What the 2025 payments were for
- Food and Beverage$226.98 · 7 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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