Invasive mucormycoses are increasingly emerging and a severe health threat with potentially fatal outcome especially for immunocompromised patients. They are challenging to diagnose: the diagnostic workup includes numerous tests, is time-intensive and frequently invasive. Cultivation is difficult and slow and yet frequently remains negative. Fast diagnosis for a timely treatment is urgently needed. We here describe a case series, where untargeted next-generation sequencing (NGS, with Noscendo’s CE-IVD marked DISQVER® pathogen test) provided identification of moulds in three patients with underlying hematologic malignancies from a standard blood draw within 24h after sample arrival.