Pilsoo Oh, MD
NPI 1043296866ActiveIndividual· Internal Medicine, Gastroenterology· Los Angeles, CA
Internal Medicine, Gastroenterology (MD) in Los Angeles, California, trained at Boston University School of Medicine (class of 2003). Their prescriptions cost Medicare Part D more than their services did: $186,925 for 1,375 claims, against $72,202 paid for services in 2024. Ardelyx, Inc. was the largest of 5 companies reporting payments in 2025, $454.38 in all, mostly food and beverage.
Overview
| NPI | 1043296866 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Dec 22, 2005 |
| Last updated in NPPES | Sep 28, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | A100119 | CA |
| Internal Medicine | 207R00000X | 217683 | MA |
| Hospitalist | 208M00000X | 227789 | 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 - Gastroenterology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 291 |
|---|---|
| Services billed | 882 across 27 procedure codes |
| Paid by Medicare | $72,202 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,375 · 1,588 30-day fills |
|---|---|
| Patients | 776 |
| Total drug cost | $186,925 |
| Generic share | 83% of claims |
Education and affiliations
| Medical school | Boston University School of Medicine |
|---|---|
| Graduation year | 2003 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Ho S Bae M D IncLos Angeles, CA · 4 clinicians
Hospital affiliation
- Hollywood Presbyterian Medical CenterLos Angeles, CA
Industry payments (Open Payments)
- 2025$454.38 · 17 payments from 5 companies
- 2024$128.97 · 5 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Ardelyx, Inc. | $226.63 | 7 |
| Gilead Sciences, Inc. | $91.83 | 4 |
| Phathom Pharmaceuticals, Inc. | $69.64 | 4 |
| Janssen Biotech, Inc. | $41.77 | 1 |
| Intercept Pharmaceuticals, Inc. | $24.51 | 1 |
What the 2025 payments were for
- Food and Beverage$454.38 · 17 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 252 gastroenterologists in Los Angeles · All gastroenterologists in California