Dr. Ryan K. Nowak, MD
Radiation Oncology (Radiation Oncology Physician)
- Medicare participating
At a glance
- Medical school
- University of Connecticut School of Medicine (2008)
- Years since graduation
- 18
- In the NPI registry since
- 2008
- Medicare patients seen, 2024
- 214
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 2008Medical school: University of Connecticut School of Medicine
- 2008Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Radiation Oncology Physician primary
SD license 9128 - Student in an Organized Health Care Education/Training Program
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Sanford Usd Medical Center Sioux Falls, SD
- Sanford Worthington Medical Center Worthington, MN
Medical groups
- Sanford Medical Center (857 clinicians)
- Sanford Clinic (268 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 214
- Services billed
- 1,708
- Patients’ average age
- 73
| Service | Times | Patients |
|---|---|---|
| Ct guidance for insertion of radiation therapy fields | 573 | 120 |
| Calculation of radiation therapy dose | 256 | 63 |
| Design and construction of complex radiation treatment device | 211 | 70 |
| Stereoscopic x-ray guidance for localization of target volume for the delivery of radiation therapy | 208 | 68 |
| Radiation treatment management, 5 treatment sessions | 163 | 76 |
| Complex radiation therapy planning | 70 | 67 |
| New patient office or other outpatient visit, 60-74 minutes | 59 | 59 |
| Established patient office or other outpatient visit, 40-54 minutes | 49 | 41 |
| Design and construction of radiation treatment device for high precision radiation therapy | 49 | 43 |
| High precision radiation therapy planning | 45 | 43 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Memantine Hcl Other prescribers in Sioux Falls, SD | 16 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 2 companies reported 2 payments worth $191 in total to this clinician.
| Gt Medical Technologies, Inc | $166 |
|---|---|
| Visionrt, Inc. | $25.01 |
| Food and Beverage | $191 |
|---|
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.
Industry-funded research
Named as a principal investigator on 1 industry-funded study in 2025, from 1 company. The companies reported $11,651 in research payments for these studies, mostly to the institutions running them.
- A Phase 3, Randomized, Placebo-Controlled Clinical Study to Evaluate the Safety and Efficacy of Stereotactic Body Radiotherapy SBRT with or without Pembrolizumab MK-3475 in Participants with Unresected Stage I or II N…
Merck Sharp & Dohme LLC
From CMS Open Payments research payments, where companies name up to five principal investigators per payment. Research payments usually go to hospitals, universities and research sites, not to the investigator personally. A payment is not evidence of wrongdoing.