Medical Oncologists and Hematologists

Medical Oncologists and Hematologists care for our patients from the moment of diagnosis throughout treatment and recovery.

Black mature doctor going over results with mature Asian cancer patient

Oncologists specialize in cancer treatment through medications, such as chemotherapy, hormones and pain management medication.

Medical Oncologists care for the patient from the moment of diagnosis throughout the course of treatment and past recovery. The focus of medical oncology is on “systemic therapy”, or providing treatments against cancer that has or could spread to other parts of the body, or in providing treatments to help shrink a cancerous tumor so the surgeon can more effectively remove it. Our experts also coordinate treatment given by other specialists.

The following Green Bay Oncology physicians provide care to patients at HSHS St. Vincent Hospital Cancer Centers at HSHS St. Nicholas Hospital in Sheboygan

Alex Coffman, MD Radiation Oncology headshot
Alex Coffman, MD
Radiation Oncology
Anthony J. Jaslowski, MD, FACP Medical Oncology and Hematology headshot
Anthony J. Jaslowski, MD, FACP
Medical Oncology and Hematology
Barbi L. Kaplan-Frenkel, DO, Radiation Oncology headshot
Barbi L. Kaplan-Frenkel, DO
Radiation Oncology
David L. Groteluschen, MD, Medical Oncology, Internal Medicine headshot
David L. Groteluschen, MD
Medical Oncology, Internal Medicine

Imaging services 

  • Digital mammography
  • Stereotactic breast biopsy
  • Needle localization
  • Computerized tomography (CT)
  • Ultrasound
  • Magnetic resonance imaging (MRI)
  • Positron emission tomography (PET)
  • Nuclear medicine
  • PICC (peripherally inserted central catheter) insertions
  • Thoracentesis, paracentesis & aspirations
  • Intrathecal Chemotherapy
  • Axumin to detect recurrence of prostate cancer

Radiation Oncology Services

  • Colonoscopy
  • Upper Endoscopy


  • Laboratory
  • Specialized staining for cancer diagnosis

Radiation Oncology Services

  • 3-dimensional conformal therapy
  • Image guided radiation therapy (IGRT)
  • Intensity modulated radiation therapy (IMRT)
  • Prostate brachytherapy
  • Superficial skin cancer radiation treatment
  • Therapeutic radioisotopes

Inpatient/Outpatient Oncology

  • Chemotherapy administration
  • Blood and platelet transfusions
  • Blood draws for laboratory testing
  • Clinical trials
  • Access/flushing of PICC lines & ports
  • Infusions & injections of supportive medications
  • Therapeutic phlebotomy


  • Inpatient surgery
  • Minimally invasive surgery
  • Outpatient surgery
  • Sentinel node biopsy

Support Services

  • Home health care
  • Hospice
  • Palliative care
  • Cancer Survivorship Program
  • Social work services
  • Spiritual support
  • The Brighter Side Boutique