Andrew Chun, MD
NPI 1255370300ActiveIndividual· Internal Medicine, Gastroenterology· Cincinnati, OH
Internal Medicine, Gastroenterology (MD) in Cincinnati, Ohio, trained at Jefferson Medical College of Thomas Jefferson University (class of 1991). Their prescriptions cost Medicare Part D more than their services did: $1,267,740 for 1,420 claims, against $139,382 paid for services in 2024. Janssen Biotech, Inc. was the largest of 17 companies reporting payments in 2025, $1,850 in all, mostly food and beverage.
Overview
| NPI | 1255370300 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 5, 2006 |
| Last updated in NPPES | Sep 26, 2024 |
| Certified by provider | Sep 26, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 35076752 | OH |
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 (OH) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 292 |
|---|---|
| Services billed | 6,059 across 40 procedure codes |
| Paid by Medicare | $139,382 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,420 · 2,335 30-day fills |
|---|---|
| Patients | 403 |
| Total drug cost | $1,267,740 |
| Generic share | 81% of claims |
Education and affiliations
| Medical school | Jefferson Medical College of Thomas Jefferson University |
|---|---|
| Graduation year | 1991 |
| Medicare specialty | Gastroenterology |
Medical groups
- Adena Medical Group LLCChillicothe, OH · 386 clinicians
- Gcga Physicians Inc.Lima, OH · 77 clinicians
Hospital affiliations
- Adena Fayette Medical CenterWashington Ch, OH
- Good Samaritan HospitalCincinnati, OH
- Mercy Health - Clermont HospitalBatavia, OH
- Mercy Health - West HospitalCincinnati, OH
- Mercy Health-Anderson HospitalCincinnati, OH
Industry payments (Open Payments)
- 2025$1,850 · 94 payments from 17 companies
- 2024$1,766 · 118 payments from 21 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $452.71 | 17 |
| Abbvie Inc. | $345.94 | 20 |
| Madrigal Pharmaceuticals | $168.75 | 6 |
| Takeda Pharmaceuticals U.S.A., Inc. | $153.08 | 11 |
| Celltrion USA Inc. | $97.78 | 5 |
What the 2025 payments were for
- Food and Beverage$1,850 · 94 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Gastroenterology providers in Cincinnati
- 1831217975
- 1144290271
- 1881636207
- 1376220145
- 1790851095
- 1720093586
- 1396833034
- 1871845446
- 1174701056
- 1932117074
- 1144259953
- 1255493185