John Markus Rieth, MD
NPI 1528559937ActiveIndividual· Internal Medicine, Medical Oncology· Iowa City, IA
Internal Medicine, Medical Oncology (MD) in Iowa City, Iowa, trained at Indiana University School of Medicine (class of 2018). Their prescriptions cost Medicare Part D more than their services did: $536,607 for 282 claims, against $25,575 paid for services in 2024. Deciphera Pharmaceuticals Inc. reported $2,512 in payments in 2025, mostly honoraria.
Overview
| NPI | 1528559937 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 21, 2018 |
| Last updated in NPPES | Jul 22, 2023 |
| Certified by provider | Jul 22, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | MD-48661 | IA |
| Internal Medicine | 207R00000X | MD-48661 | IA |
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 - Medical Oncology (IA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 135 |
|---|---|
| Services billed | 415 across 16 procedure codes |
| Paid by Medicare | $25,575 |
Part D prescriptions in 2024
| Prescriptions (claims) | 282 · 306 30-day fills |
|---|---|
| Patients | 53 |
| Total drug cost | $536,607 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | Indiana University School of Medicine |
|---|---|
| Graduation year | 2018 |
| Medicare specialty | Medical Oncology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- State University of IowaCoralville, IA · 1,897 clinicians
Hospital affiliations
- Regional Medical CenterManchester, IA
- St Lukes HospitalCedar Rapids, IA
- University of Iowa Health Care Medical Center DownIowa City, IA
- University of Iowa Hospital & ClinicsIowa City, IA
Industry payments (Open Payments)
- 2025$2,512 · 6 payments from 1 company
- 2024$8,622 · 19 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Deciphera Pharmaceuticals Inc. | $2,512 | 6 |
What the 2025 payments were for
- Honoraria$1,665 · 1 payment
- Travel and Lodging$692.91 · 2 payments
- Food and Beverage$153.98 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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