Fabian A. Mendoza Ballesteros, M.D
NPI 1164689840ActiveIndividual· Internal Medicine, Rheumatology· Philadelphia, PA
Internal Medicine, Rheumatology (M.D) with Jefferson University Physicians, practicing in Philadelphia, Pennsylvania. Their prescriptions cost Medicare Part D more than their services did: $2,045,102 for 1,516 claims, against $91,379 paid for services in 2024. Abbvie Inc. was the largest of 4 companies reporting payments in 2025, $6,869 in all, mostly consulting fees. Lists Chester County Hospital and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1164689840 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D |
| Sole proprietor | No |
| NPI issued | May 20, 2008 |
| Last updated in NPPES | Nov 20, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Rheumatology Primary | 207RR0500X | MD436636 | PA |
| Internal Medicine, Rheumatology | 207RR0500X | 003041 | NY |
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 - Rheumatology (PA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 240 |
|---|---|
| Services billed | 2,109 across 28 procedure codes |
| Paid by Medicare | $91,379 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,516 · 3,117 30-day fills |
|---|---|
| Patients | 263 |
| Total drug cost | $2,045,102 |
| Generic share | 79% of claims |
Education and affiliations
| Graduation year | 1999 |
|---|---|
| Medicare specialty | Rheumatology |
| Telehealth | Offers telehealth |
Medical group
- Jefferson University PhysiciansPhiladelphia, PA · 1,531 clinicians
Hospital affiliations
- Chester County HospitalWest Chester, PA
- Jefferson Stratford HospitalStratford, NJ
- Thomas Jefferson University HospitalPhiladelphia, PA
Industry payments (Open Payments)
- 2025$6,869 · 11 payments from 4 companies
- 2024$1,464 · 9 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $5,200 | 1 |
| Argenx US, Inc. | $1,406 | 8 |
| Sobi, Inc | $137.39 | 1 |
| Ucb, Inc. | $124.99 | 1 |
What the 2025 payments were for
- Consulting Fee$5,200 · 1 payment
- Travel and Lodging$1,105 · 3 payments
- Food and Beverage$564.30 · 7 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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