Muaz Nizar Assaf, MD
NPI 1497337802ActiveIndividual· Internal Medicine· Berwyn, IL
Internal Medicine (MD) with Methodist Medical Center of Illinois, practicing in Berwyn, Illinois. Their prescriptions cost Medicare Part D more than their services did: $12,142 for 193 claims, against $5,138 paid for services in 2024. Stryker Corporation reported $174.76 in payments in 2025, mostly food and beverage. Lists Carle Health Methodist Hospital as a hospital affiliation.
Overview
| NPI | 1497337802 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 25, 2021 |
| Last updated in NPPES | Oct 28, 2026 |
| Certified by provider | Oct 28, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | W8803 | TX |
| Internal Medicine | 207R00000X | 036170605 | IL |
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 - Internal Medicine (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 35 |
|---|---|
| Services billed | 73 across 6 procedure codes |
| Paid by Medicare | $5,138 |
Part D prescriptions in 2024
| Prescriptions (claims) | 193 · 427 30-day fills |
|---|---|
| Patients | 38 |
| Total drug cost | $12,142 |
| Generic share | 85% of claims |
Education and affiliations
| Graduation year | 2021 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical group
- Methodist Medical Center of IllinoisPeoria, IL · 382 clinicians
Hospital affiliation
- Carle Health Methodist HospitalPeoria, IL
Industry payments (Open Payments)
- 2025$174.76 · 1 payment from 1 company
- 2024$49.89 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Stryker Corporation | $174.76 | 1 |
What the 2025 payments were for
- Food and Beverage$174.76 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 79 internal medicine physicians in Berwyn · All internal medicine physicians in Illinois