Mark J. Jarek, MD
NPI 1013955541ActiveIndividual· Internal Medicine, Rheumatology· Republic, MO
Internal Medicine, Rheumatology (MD) in Republic, Missouri, trained at Hahnemann University College of Medicine (class of 1989). Their prescriptions cost Medicare Part D more than their services did: $5,424,507 for 4,269 claims, against $25,760 paid for services in 2024. Amgen Inc. was the largest of 9 companies reporting payments in 2025, $853.75 in all, mostly food and beverage.
Overview
| NPI | 1013955541 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 4, 2006 |
| Last updated in NPPES | Mar 21, 2025 |
| Certified by provider | Mar 21, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Rheumatology Primary | 207RR0500X | 114482 | MO |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Rheumatology (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 234 |
|---|---|
| Services billed | 559 across 12 procedure codes |
| Paid by Medicare | $25,760 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,269 · 8,171 30-day fills |
|---|---|
| Patients | 494 |
| Total drug cost | $5,424,507 |
| Generic share | 81% of claims |
Education and affiliations
| Medical school | Hahnemann University College of Medicine |
|---|---|
| Graduation year | 1989 |
| Medicare specialty | Rheumatology |
Medical groups
- Freeman-Oak Hill Health SystemJoplin, MO · 394 clinicians
- Citizens Memorial HealthcareBolivar, MO · 146 clinicians
Hospital affiliations
- Citizens Memorial HospitalBolivar, MO
- Freeman Health System - Freeman WestJoplin, MO
- Mercy Hospital CarthageCarthage, MO
- Mercy Hospital JoplinJoplin, MO
- Mercy Hospital Pittsburg, IncPittsburg, KS
Industry payments (Open Payments)
- 2025$853.75 · 45 payments from 9 companies
- 2024$21.46 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $616.52 | 33 |
| Novartis Pharmaceuticals Corporation | $71.47 | 3 |
| Abbvie Inc. | $43.04 | 2 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $38.69 | 2 |
| Genzyme Corporation | $20.99 | 1 |
What the 2025 payments were for
- Food and Beverage$853.75 · 45 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records