Particle precipitation acts as one of the dominant processes contributing to the dynamic variations of energetic particles in the magnetosphere. These loss processes take place over a wide range of spatial scales from local wave-particle interactions to large system-scales and timescales from seconds to tens of days. With growing observations from space- and ground-based missions and the development of sophisticated models, advances have been made on improved understanding of the drivers, properties, and consequences of magnetospheric particle precipitation. This session solicits presentations that feature recent progress made on understanding energetic particle precipitation and its effects on the coupled ionosphere-thermosphere-magnetosphere system. We encourage results utilizing multipoint measurements from near-equatorial satellites (e.g., Van Allen Probes, Arase, MMS, THEMIS, GOES) in conjunction with low-altitude and/or ground-based measurements (e.g., BARREL, POES, FIREBIRD, AC6, CSSWE, ground-based imagers, riometers, and magnetometers) and coordinated modeling and theoretical efforts.