Yang Liu, M.D.
NPI 1033430913ActiveIndividual· Internal Medicine, Gastroenterology· Monterey Park, CA
Internal Medicine, Gastroenterology (M.D.) in Monterey Park, California, trained at Saint Louis University School of Medicine (class of 2010). Their prescriptions cost Medicare Part D more than their services did: $87,789 for 596 claims, against $44,995 paid for services in 2024. Madrigal Pharmaceuticals was the largest of 8 companies reporting payments in 2025, $1,897 in all, mostly food and beverage.
Overview
| NPI | 1033430913 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 15, 2010 |
| Last updated in NPPES | Jan 21, 2024 |
| Certified by provider | Jan 21, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 173853 | CA |
| Internal Medicine | 207R00000X | 0101250846 | VA |
| Internal Medicine, Gastroenterology | 207RG0100X | 0101250846 | VA |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (CA); Practitioner - Gastroenterology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 230 |
|---|---|
| Services billed | 410 across 12 procedure codes |
| Paid by Medicare | $44,995 |
Part D prescriptions in 2024
| Prescriptions (claims) | 596 · 947 30-day fills |
|---|---|
| Patients | 298 |
| Total drug cost | $87,789 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | Saint Louis University School of Medicine |
|---|---|
| Graduation year | 2010 |
| Medicare specialty | Gastroenterology |
Medical group
- Global Gastroenterology Group IncMonterey Park, CA · 2 clinicians
Industry payments (Open Payments)
- 2025$1,897 · 47 payments from 8 companies
- 2024$1,610 · 27 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Madrigal Pharmaceuticals | $451.46 | 12 |
| Phathom Pharmaceuticals, Inc. | $404.92 | 8 |
| Gilead Sciences, Inc. | $372.87 | 8 |
| Ardelyx, Inc. | $239.57 | 8 |
| Janssen Biotech, Inc. | $163.59 | 5 |
What the 2025 payments were for
- Food and Beverage$1,897 · 47 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All Internal Medicine, Gastroenterology providers in California →