Practice address
1309 W 17th St
Sioux Falls, SD 57104
This is the address of Sanford Medical Center, Sanford Medical Center, Sanford Medical Center, Sanford Medical Center, Sanford Medical Center.
At a glance
- Clinicians registered here
- 27
- Physicians (MD and DO)
- 9
- Specialties
- 10
- Industry payments to them, 2025
- $2,084
Specialties here
Who practices here
27 clinicians
- Amy N. Sanford, M.D. Hematology & Oncology · Ste 101
- Ashley K. Heupel, CNP Nurse Practitioners
- Chelsey Zondervan, CNP Nurse Practitioners
- Emily J. Zweifel, CSW-PIP Clinical Social Workers
- Heather J. Tietjen, NP Nurse Practitioners
- Jason Spaans, PHD Radiological Physics
- Joe P. Weber, PHARMD Pharmacists · Suite 101
- Jonathan S. Bleeker, MD Hematology & Oncology · Ste 101
- Joseph Driewer, PHD Radiological Physics
- Kelly A. Tolley, CNP Nurse Practitioners
- Kimberly C. Niemann, CNP Nurse Practitioners
- Kimberly R. Hamer, DNP, CNP, FNP-C Nurse Practitioners · Ste 101
- Kristen K. Maughan, MS,RDN,LDN Registered Dietitians
- Larissa L. Risty, CGC Genetic Counselors
- Laurie C. Gromer, CNP Nurse Practitioners
- Lynnette Seyer, PHARM.D., BCPS Pharmacists · Suite 101
- Marin M. Schaefer, CNP Nurse Practitioners
- Mary E. Jones, LMFT, LPC Professional Counselors · Ste 101
- Michael D. Keppen, M.D. Hematology & Oncology · Ste 101
- Michele M. Lohr, M.D. Radiation Oncology
- Miroslaw A. Mazurczak, M.D. Hematology & Oncology · Ste 101
- Na Smith Radiation Oncology
- Ryan K. Nowak, MD Radiation Oncology
- Shannon M. Peters, MD Hospice & Palliative Medicine
- Steven Mcgraw, MD Radiation Oncology
- Susan J. Halbritter, CNP Nurse Practitioners · Ste 101
- Tamara J. Top, CNP Nurse Practitioners · Ste 101
Hospitals and medical groups at this address
- Sanford Medical Center 31 of its clinicians here 857
- Sanford Medical Center 12 of its clinicians here 857
- Sanford Medical Center 3 of its clinicians here 857
- Sanford Medical Center 2 of its clinicians here 857
- Sanford Medical Center 1 of its clinicians here 857
From Medicare Care Compare. Numbers on the right are each organization’s clinicians in total.
Industry payments
Drug and device makers reported $2,084 in general payments to 9 clinicians at this address in 2025.
- Ashley K. Heupel, CNP $665
- Tamara J. Top, CNP $654
- Kelly A. Tolley, CNP $347
- Ryan K. Nowak, MD $191
- Miroslaw A. Mazurczak, M.D. $63
- Kimberly R. Hamer, DNP, CNP, FNP-C $57
- Jonathan S. Bleeker, MD $50
- Amy N. Sanford, M.D. $31
CMS Open Payments (meals, speaking, consulting and similar; not research). A payment is not evidence of wrongdoing.
Industry-funded research
4 clinicians here are named as investigators on industry-funded studies ($132,406 in research payments reported in 2025).
- Amy N. Sanford, M.D. 1 study $111,096
- Ryan K. Nowak, MD 1 study $11,651
- Jonathan S. Bleeker, MD 2 studies $6,094
- Miroslaw A. Mazurczak, M.D. 1 study $3,565
Research payments usually go to the hospital or research site, not to the investigator personally.
Organizations registered here
- Sanford Clinic Family Medicine
- Sanford Clinic Hematology & Oncology
- Sanford Clinic Non-Pharmacy Dispensing Site
- Sanford Clinic Radiation Oncology
Sources: CMS NPPES NPI Registry (who is registered at this address, as each clinician reported it), Medicare Care Compare (hospitals and groups), CMS Open Payments 2025. Addresses can be out of date; call before visiting.