Mark O. Carlson, M.D.
NPI 1609837368ActiveIndividual· Internal Medicine· Sioux City, IA
Internal Medicine (M.D.) in Sioux City, Iowa, trained at University of Minnesota Medical School (class of 1986). Their prescriptions cost Medicare Part D more than their services did: $694,707 for 4,514 claims, against $132,838 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 16 companies reporting payments in 2025, $821.12 in all, mostly food and beverage.
Overview
| NPI | 1609837368 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Mar 31, 2006 |
| Last updated in NPPES | Nov 22, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 27247 | 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 - Internal Medicine (IA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 175 |
|---|---|
| Services billed | 3,006 across 66 procedure codes |
| Paid by Medicare | $132,838 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,514 · 8,855 30-day fills |
|---|---|
| Patients | 234 |
| Total drug cost | $694,707 |
| Generic share | 80% of claims |
Education and affiliations
| Medical school | University of Minnesota Medical School |
|---|---|
| Graduation year | 1986 |
| Medicare specialty | Internal Medicine |
Medical group
- Siouxland Adult Medicine, PLLCSioux City, IA · 3 clinicians
Hospital affiliations
- Floyd Valley HealthcareLe Mars, IA
- St Lukes Regional Medical CenterSioux City, IA
Other facilities
- Unitypoint at HomeHome health agency · Sioux City, IA
- Care Initiatives Hospice - Sioux CityHospice · Sioux City, IA
Industry payments (Open Payments)
- 2025$821.12 · 49 payments from 16 companies
- 2024$5,659 · 80 payments from 14 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $229.93 | 20 |
| Novo Nordisk Inc | $137.88 | 6 |
| Mannkind Corporation | $66.99 | 2 |
| Bayer Healthcare Pharmaceuticals Inc. | $53.89 | 2 |
| Mallinckrodt Hospital Products Inc. | $44.85 | 2 |
What the 2025 payments were for
- Food and Beverage$746.35 · 47 payments
- Education$74.77 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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