ORTONVILLE AREA HEALTH SERVICES - Key Persons


Amanda McMahon

Job Titles:
  • Family Medicine - Obstetrics

David Collins

Dr. Collins received his Medical Degree in 2017 from the University of North Dakota School of Medicine and Health in Grand Forks, North Dakota. Additionally, he completed his Emergency Medicine Residency through University of Missouri - Columbia Program in Columbia, MO. Dr. Collins is board certified in Emergency Medicine and has been practicing at Ortonville Area Health Services since 2020.

Dr. Greg Gerrish

Job Titles:
  • Board Certified General Surgeon
  • General Surgeon
Dr. Greg Gerrish, General Surgeon, diagnoses and treats common conditions; such as gall bladder disorders, hernias, breast diseases, thyroid disease, colon cancer screening and treatment, and gastroesophageal reflux. No referral is required. Dr. Greg Gerrish is a board certified General Surgeon who diagnoses and treats health conditions. Conditions treated by Dr. Gerrish include, but are not limited to, acid reflux, thyroid disease, stomach ulcers, rectal/anal disorders, gall bladder disorders, hernias, and breast disease. Dr. Gerrish also offers screenings such as colonoscopies. Dr. Gerrish's special interests include: Minimally invasive surgery Surgery of the colon and rectum Hernia Wound Management Trauma Acid Reflux Colonoscopy/Upper endoscopy

Dr. Orvar Jonsson

Dr. Orvar Jonsson practices cardiology in southeastern South Dakota and southwestern Minnesota. He also serves as director of the Heart Failure Clinic at Sanford Heart Hospital; director of the Pulmonary Hypertension Clinic at Sanford Heart Hospital; and academic assistant professor at the University of South Dakota Sanford School of Medicine.

Kevin Benson

Job Titles:
  • Lead Physician at the Sanford Health System Women 's Health Department
Dr. Benson has served as the lead physician at the Sanford Health System Women's Health Department. He specializes in urogynecology and women's health services. In his spare time, Dr. Benson enjoys being outdoors, woodworking, and spending time with his family.

Michael Vener

Dr. Vener grew up in Arlington, MN. After high school he attended the University of St. Thomas in St. Paul, MN where he graduated with honors with his BA degree in Biology. He then attended medical school at the University of Minnesota School of Medicine and remained in Minnesota to complete his residency in Orthopaedic Surgery. Dr. Vener has been a surgeon in Watertown, SD since 1995. He and his partners built a rural orthopaedic practice, Glacial Lakes Orthopaedics, which transitioned to Prairie Lakes Orthopedics in 2022. His areas of interest include shoulder, sports medicine and adult reconstruction. Dr. Vener and his wife have two adult children and his hobbies include hunting, cooking, boating, scuba diving and watching baseball, both local and professional. Dr. Vener is an active board member of the Lake Area Zoological Society. For more information, visit the Prairie Lakes website.

Robert Ross

Job Titles:
  • Family Medicine

Sarah Fischer

Job Titles:
  • Family Medicine - Obstetrics
Dr. Fischer is originally from the Dumont, MN area. She received her medical degree from the University of Minnesota Medical School in Duluth and Minneapolis and completed her Family Medicine specialty training at Altru Health Systems in Grand Forks, ND. In coordination with OAHS providers and leaders, she also completed an additional obstetrics fellowship at Altru Health Systems in Grand Forks, ND. Dr. Fischer has been practicing at Ortonville Area Health Services since 2020.

Stacy Longnecker

Job Titles:
  • Family Medicine - Obstetrics

Susan Andersen

Job Titles:
  • Family Medicine - Obstetrics
Dr. Andersen is originally from Fairmont, MN. She is a graduate of Sanford School of Medicine of USD with undergrad and Master's degrees from SDSU in Brookings, SD. Dr. Andersen completed her medical residency at Sioux Falls Family Medicine Residency Program and has been practicing at Ortonville Area Health Services since 2014.