Yes, it is. Although individual traditions have always been studied in their own right - such as academic texts on witchcraft – bringing together the various strands of esotericism has also become a field of research. This began in the 1960s at places like the Warburg Institute in London. Henry Corbin famously wrote on the subject while teaching Islamic Studies at the Sorbonne in Paris. The University of Amsterdam has a tradition of academic research into Western esotericism, as well.