FCN1 (ficolin-1) is a pattern recognition molecule with enriched expression in monocytes broadly. FCGR3A (CD16), HES4, LST1, and DGKG show enriched expression in CD14⁺CD16⁺ non-classical monocytes specifically, with FCGR3A being the defining surface marker of this subset. Together these markers identify the non-classical monocyte subset and distinguish them from classical monocyte populations.