Quick answers
- Does Christopher J. Sumey accept Medicare assignment?
- Yes. Medicare's clinician data says Christopher J. Sumey accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Christopher J. Sumey see?
- In 2024, CMS data shows 514 Original Medicare patients and 2,245 services for Christopher J. Sumey. This counts Original Medicare only and measures volume, not quality.
- What is Christopher J. Sumey's NPI number?
- 1588836548. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Christopher J. Sumey, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 514 |
|---|---|
| Services billed to Medicare | 2,245 |
| Different services or procedures | 21 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)939 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)448 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)396 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)121 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)57 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)61%
- Arthritis48%
- Ischemic heart disease37%
- Chronic kidney disease36%
Hospitals where Christopher J. Sumey works
Medicare's Facility Affiliation Data lists Christopher J. Sumey at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Orange City Area Health SystemOrange City, IA · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 161360
- Sanford Canby Medical CenterCanby, MN · Critical Access Hospital · Emergency services: listed by Medicare · CCN 241347
- Sanford Chamberlain Medical CenterChamberlain, SD · Critical Access Hospital · Emergency services: listed by Medicare · CCN 431329
- Sanford Usd Medical CenterSioux Falls, SD · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 430027
- Sanford Worthington Medical CenterWorthington, MN · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 240022
Practice locations
Addresses where Christopher J. Sumey is enrolled with Medicare (CMS data updated October 2, 2026).
- 1309 W 17th St, Suite 101Sioux Falls, SD 57104 (605) 328‑8000
Group practices
Medicare enrollment lists Christopher J. Sumey as a member of this group (CMS data updated October 2, 2026).
- Sanford Medical Center857 clinicians in the group
Specialties
- Hematology/Oncologyprimary
Other hematologist-oncologists in Sioux Falls
Clinicians with the same Medicare primary specialty in Sioux Falls, SD — not a recommendation.
Other clinicians in Sanford Medical Center
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Washington University School Of Medicine |
| Graduation year | 2008 (18 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1588836548 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians