Wanjun Bae, M.D.
NPI 1457433906ActiveIndividual· Internal Medicine, Gastroenterology· Mission Viejo, CA
Internal Medicine, Gastroenterology (M.D.) in Mission Viejo, California, trained at University of Missouri, Columbia School of Medicine (class of 2002). Their prescriptions cost Medicare Part D more than their services did: $186,059 for 1,021 claims, against $78,707 paid for services in 2024. Abbvie Inc. was the largest of 20 companies reporting payments in 2025, $4,448 in all, mostly food and beverage.
Overview
| NPI | 1457433906 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Oct 20, 2006 |
| Last updated in NPPES | Oct 26, 2020 |
| Certified by provider | Oct 26, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | A85159 | CA |
| Internal Medicine | 207R00000X | A85159 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 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 | 326 |
|---|---|
| Services billed | 739 across 32 procedure codes |
| Paid by Medicare | $78,707 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,021 · 1,686 30-day fills |
|---|---|
| Patients | 488 |
| Total drug cost | $186,059 |
| Generic share | 66% of claims |
Education and affiliations
| Medical school | University of Missouri, Columbia School of Medicine |
|---|---|
| Graduation year | 2002 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Providence Medical FoundationVictorville, CA · 1,466 clinicians
Hospital affiliation
- Providence Mission HospitalMission Viejo, CA
Industry payments (Open Payments)
- 2025$4,448 · 184 payments from 20 companies
- 2024$3,925 · 167 payments from 19 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $1,016 | 49 |
| Janssen Biotech, Inc. | $691.37 | 20 |
| Takeda Pharmaceuticals U.S.A., Inc. | $425.35 | 28 |
| Pfizer Inc. | $355.65 | 13 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $327.00 | 15 |
What the 2025 payments were for
- Food and Beverage$4,448 · 184 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All Internal Medicine, Gastroenterology providers in California →