KroMreža is a dedicated and independent non-profit organization in Croatia, established to support hematology nurses and technicians in their vital work caring for hematological patients. Officially registered on June 9, 2021, KroMreža aims to enhance nursing practices, promote professional development, and advocate for the hematology nursing profession. The organization actively participates in education initiatives and hosts expert events, fostering collaboration among healthcare professionals and improving patient outcomes.

KroMreža engages in various activities including public awareness campaigns, such as commemorating World Leukemia Day and Blood Donor Day, which aim to educate the community on critical health issues related to hematology. Additionally, the organization provides valuable resources for patients and their families, including informative leaflets about bone marrow transplantation procedures. Through its commitment to advancing nursing standards and patient care, KroMreža serves as a vital resource and support network for those in the field of hematology.