Ariel Lopez-Chavez, M.D., M.S.
NPI 1871786913ActiveIndividual· Internal Medicine, Medical Oncology· Pittsburgh, PA
Internal Medicine, Medical Oncology (M.D., M.S.) with Allegheny Clinic Medical Oncology, practicing in Pittsburgh, Pennsylvania. Their prescriptions cost Medicare Part D more than their services did: $399,477 for 92 claims, against $17,598 paid for services in 2024. Coherus Oncology, Inc. was the largest of 2 companies reporting payments in 2025, $77.34 in all, mostly food and beverage. Lists Ahn Wexford Hospital and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1871786913 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D., M.S. |
| Sole proprietor | No |
| NPI issued | Aug 22, 2007 |
| Last updated in NPPES | Jul 27, 2023 |
| Certified by provider | Jul 26, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | MD435376 | PA |
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 - Medical Oncology (PA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 67 |
|---|---|
| Services billed | 186 across 13 procedure codes |
| Paid by Medicare | $17,598 |
Part D prescriptions in 2024
| Prescriptions (claims) | 92 · 112 30-day fills |
|---|---|
| Patients | 34 |
| Total drug cost | $399,477 |
| Generic share | 71% of claims |
Education and affiliations
| Graduation year | 2005 |
|---|---|
| Medicare specialty | Medical Oncology |
| Telehealth | Offers telehealth |
Medical group
- Allegheny Clinic Medical OncologyKittanning, PA · 97 clinicians
Hospital affiliations
- Ahn Wexford HospitalWexford, PA
- Allegheny General HospitalPittsburgh, PA
- Jefferson HospitalJefferson Hills, PA
- West Penn HospitalPittsburgh, PA
Industry payments (Open Payments)
- 2025$77.34 · 3 payments from 2 companies
- 2024$1,589 · 3 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Coherus Oncology, Inc. | $43.95 | 1 |
| Caris Mpi, Inc. | $33.39 | 2 |
What the 2025 payments were for
- Food and Beverage$77.34 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Medical Oncology providers in Pittsburgh
- 1174510689
- 1497982649
- 1922044098
- 1114954153
- 1144220385
- 1326251299
- 1821416801
- 1679839591
- 1033344213
- 1093207201
- 1578564019
- 1063760676
All Internal Medicine, Medical Oncology providers in Pennsylvania →