Walton Cheng Toy, MD
NPI 1033231915ActiveIndividual· Internal Medicine, Rheumatology· Rogers, AR
Internal Medicine, Rheumatology (MD) with Mercy Health Northwest Arkansas Communities, practicing in Rogers, Arkansas. Their prescriptions cost Medicare Part D more than their services did: $2,819,519 for 4,755 claims, against $578,682 paid for services in 2024. Amgen Inc. was the largest of 8 companies reporting payments in 2025, $577.87 in all, mostly food and beverage. Lists Mercy Hospital Northwest Arkansas as a hospital affiliation.
Overview
| NPI | 1033231915 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 4, 2007 |
| Last updated in NPPES | Mar 28, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Rheumatology Primary | 207RR0500X | E4494 | 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 - Rheumatology (AR) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 396 |
|---|---|
| Services billed | 51,408 across 46 procedure codes |
| Paid by Medicare | $578,682 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,755 · 9,671 30-day fills |
|---|---|
| Patients | 571 |
| Total drug cost | $2,819,519 |
| Generic share | 87% of claims |
Education and affiliations
| Graduation year | 1999 |
|---|---|
| Medicare specialty | Rheumatology |
| Telehealth | Offers telehealth |
Medical group
- Mercy Health Northwest Arkansas CommunitiesBella Vista, AR · 318 clinicians
Hospital affiliation
- Mercy Hospital Northwest ArkansasRogers, AR
Industry payments (Open Payments)
- 2025$577.87 · 33 payments from 8 companies
- 2024$515.06 · 28 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $243.01 | 16 |
| Abbvie Inc. | $128.95 | 7 |
| E.R. Squibb & Sons, L.L.C. | $60.38 | 3 |
| Astrazeneca Pharmaceuticals LP | $56.99 | 2 |
| Glaxosmithkline, LLC. | $33.14 | 2 |
What the 2025 payments were for
- Food and Beverage$534.62 · 32 payments
- Education$43.25 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Rheumatology providers in Rogers
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