Enríquez entered the University of Concepción, Chile at the age of 16 to study medicine. At the age of 23 he graduated with a Medical Degree, which he obtained with "greatest distinction" ("distinción máxima"), obtaining the second highest marks in his class (first and third were respectively Jorge Gutiérrez Correa and Bautista van Schouwen, also militants of MIR). This distinction earned Miguel at the same time a specialization scholarship to attend the prestigious Neurological Institute of Santiago de Chile. He specialized and was trained as a Neurologist.