  This is an overview of the eleventh edition of the BioASQ challenge in the
context of the Conference and Labs of the Evaluation Forum (CLEF) 2023. BioASQ
is a series of international challenges promoting advances in large-scale
biomedical semantic indexing and question answering. This year, BioASQ
consisted of new editions of the two established tasks b and Synergy, and a new
task (MedProcNER) on semantic annotation of clinical content in Spanish with
medical procedures, which have a critical role in medical practice. In this
edition of BioASQ, 28 competing teams submitted the results of more than 150
distinct systems in total for the three different shared tasks of the
challenge. Similarly to previous editions, most of the participating systems
achieved competitive performance, suggesting the continuous advancement of the
state-of-the-art in the field.
