John Windsor Esther, M.D.
NPI 1174056121ActiveIndividual· Internal Medicine, Hematology & Oncology· Springdale, AR
Internal Medicine, Hematology & Oncology (M.D.) in Springdale, Arkansas, trained at University of Arkansas College of Medicine (class of 2017). In 2024 Medicare paid $5,223,289 for 1,375 patients, and Part D covered 1,801 of their prescriptions, 80% of them generic. Pharmaessentia USA Corporation was the largest of 24 companies reporting payments in 2025, $8,174 in all, mostly consulting fees.
Overview
| NPI | 1174056121 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Apr 6, 2017 |
| Last updated in NPPES | Jul 6, 2026 |
| Certified by provider | Jul 6, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | E16209 | AR |
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 - Hematology/Oncology (AR) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,375 |
|---|---|
| Services billed | 274,037 across 307 procedure codes |
| Paid by Medicare | $5,223,289 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,801 · 2,301 30-day fills |
|---|---|
| Patients | 337 |
| Total drug cost | $2,362,369 |
| Generic share | 80% of claims |
Education and affiliations
| Medical school | University of Arkansas College of Medicine |
|---|---|
| Graduation year | 2017 |
| Medicare specialty | Hematology/Oncology |
| Telehealth | Offers telehealth |
Medical group
- Highlands Oncology Group PAMountain Home, AR · 84 clinicians
Hospital affiliations
- Baxter HealthMountain Home, AR
- Mercy Hospital BerryvilleBerryville, AR
- Mercy Hospital Northwest ArkansasRogers, AR
- Northwest Medical Center-SpringdaleSpringdale, AR
- Washington Regional Medical CenterFayetteville, AR
Industry payments (Open Payments)
- 2025$8,174 · 63 payments from 24 companies
- 2024$5,725 · 67 payments from 28 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pharmaessentia USA Corporation | $7,119 | 7 |
| Novartis Pharmaceuticals Corporation | $225.84 | 13 |
| Pfizer Inc. | $144.27 | 4 |
| Janssen Biotech, Inc. | $82.30 | 5 |
| Iovance Biotherapeutics, Inc. | $74.97 | 5 |
What the 2025 payments were for
- Consulting Fee$7,053 · 2 payments
- Food and Beverage$1,071 · 59 payments
- Education$51.05 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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