Christopher Joseph Sumey, M.D.
NPI 1588836548ActiveIndividual· Internal Medicine, Hematology & Oncology· Sioux Falls, SD
Internal Medicine, Hematology & Oncology (M.D.) in Sioux Falls, South Dakota, trained at Washington University School of Medicine (class of 2008). Their prescriptions cost Medicare Part D more than their services did: $2,898,312 for 1,543 claims, against $120,081 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 2 companies reporting payments in 2025, $67.52 in all, mostly education.
Overview
| NPI | 1588836548 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Mar 31, 2008 |
| Last updated in NPPES | Aug 14, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 9500 | SD |
| Internal Medicine | 207R00000X | 49919 | CO |
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 - Hematology/Oncology (SD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 514 |
|---|---|
| Services billed | 2,245 across 21 procedure codes |
| Paid by Medicare | $120,081 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,543 · 1,823 30-day fills |
|---|---|
| Patients | 259 |
| Total drug cost | $2,898,312 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | Washington University School of Medicine |
|---|---|
| Graduation year | 2008 |
| Medicare specialty | Hematology/Oncology |
| Telehealth | Offers telehealth |
Medical group
- Sanford Medical CenterSioux Falls, SD · 857 clinicians
Hospital affiliations
- Orange City Area Health SystemOrange City, IA
- Sanford Canby Medical CenterCanby, MN
- Sanford Chamberlain Medical CenterChamberlain, SD
- Sanford Usd Medical CenterSioux Falls, SD
- Sanford Worthington Medical CenterWorthington, MN
Other facilities
- Sanford HospiceHospice · Sioux Falls, SD
Industry payments (Open Payments)
- 2025$67.52 · 2 payments from 2 companies
- 2024$29.33 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $43.25 | 1 |
| E.R. Squibb & Sons, L.L.C. | $24.27 | 1 |
What the 2025 payments were for
- Education$43.25 · 1 payment
- Food and Beverage$24.27 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 27 hematologist-oncologists in Sioux Falls · All hematologist-oncologists in South Dakota