Occupational Health

Dr. Kym Life is an internist by training and enjoys working with her patients to determine the best treatment plan that fits their needs. Dr. Life values the importance of a healthy lifestyle and when not at work, enjoys spending time outdoors and riding her bicycle. Department Occupational Health Board Status American Board of Osteopathic…

Melissa Lamb, ARNP

Allergy/ Immunology/ Pulmonology

Melissa Lamb, ARNP-BC specializes in the areas of allergy, immunology and pulmonology and has been with Mahaska Health since 2006. Lamb joined the team at Mahaska Health after 5 years of extensive pulmonary specialty experience at Mayo Clinic in Rochester, Minnesota. Melissa can empathize with patients because she has been on the patient side of…

Greg Kronenberg, CRNA

Pain Management, Anesthesiology

Greg Kronenberg is a certified registered nurse anesthetist with over 20 years of nurse anesthesia experience and 10 years of pain management expertise. Greg practices integrative medicine which involves being open to any beneficial treatment options. He believes everyone’s experiences and beliefs are unique and therefore their treatment needs to be tailored to that individual.…

Family Practice

Gayle Johnson, ARNP joined Mahaska Health in November 2019. For more than 30 years, Gayle has been a caring nurse in Grinnell, Iowa. During her tenure there, she has worked in the Medical Surgical Unit as a charge nurse and served as clinical advisor for the medical surgical unit, intensive care unit, emergency department, and…

Tonya Johannes, DNP, ARNP-BC

Tonya Johannes, DNP, ARNP-BC has been a nurse practitioner at Mahaska Health since 2016 and has served the healthcare field since 2003 in nursing home, hospital and clinical settings. Johannes grew up in Albia, IA and chose the medical field after spending an entire summer in a hospital helping to care for her grandmother. She…

Edward Hirl, MD

Electromyography

Dr. Marvin Hurd is at Mahaska Health the 2nd & 4th Wednesday of every month. To schedule an appointment, call Mahaska Health Medical Group at 641.672.3360 Specialty Electromyography Board Status American Board of Electrodiagnostic Medicine American Board of Physical Medicine and Rehabilitation Education University of Iowa College of Medicine, Iowa City, IA Residency Ohio State…

Bradley Hiatt, DO Oncology, Hematology

Oncology, Hematology

Dr. Brad Hiatt who has served the Mahaska Health Community for over 15 years. Dr. Hiatt was born and raised in Iowa, and completed his undergraduate and residency at the University of Iowa, and serves as our Cancer Care and Infusion Center physician. As an Iowa native, Dr. Hiatt attended medical school at Des Moines…

Hospitalist, Inpatient Medicine

Family Nurse Practitioner Robyn Griffiths is a full-time Hospitalist at Mahaska Health. She has a passion for nursing and pursued an advanced degree to be more involved in her patient’s healthcare decisions. Caring for people is an honor and a privilege for Robyn and she believes her Hospitalist role allows her to provide more personalized…

Family Practice, Obstetrics

Family Practice and Obstetrics Physician Angela Godejohn, MD, loves helping to safely bring new life into the world while supporting the healthcare needs of women during different stages of change. She has served with the Navy all over the world but chose to settle in the midwest because she appreciates small town living and the…

Board-certified, Fellowship trained Orthopaedic Surgeon

Jon Gehrke, M.D. joined the Mahaska Health orthopaedics care team 2019. Dr. Gehrke is Board Certified and completed three Fellowships in sports medicine, general orthopaedics and foot & ankle surgery.