Esther Bak, MD
NPI 1881259661ActiveIndividual· Internal Medicine· Louisville, KY
Internal Medicine (MD) in Louisville, Kentucky, licensed in KY, with an NPI issued in May 2019. 40 Medicare patients in 2024, $6,390 paid; nearly all of their 101 Part D prescriptions were generic (95%).
Overview
| NPI | 1881259661 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 7, 2019 |
| Last updated in NPPES | Mar 26, 2024 |
| Certified by provider | Mar 26, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 59173 | KY |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
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 Order and Referring Only - Rheumatology (NC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 40 |
|---|---|
| Services billed | 88 across 13 procedure codes |
| Paid by Medicare | $6,390 |
Part D prescriptions in 2024
| Prescriptions (claims) | 101 · 217 30-day fills |
|---|---|
| Patients | 42 |
| Total drug cost | $3,449 |
| Generic share | 95% of claims |
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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