  I present a general method for determining the massive cusp anomalous
dimension in QCD to a very high degree of accuracy using its asymptotic
behavior at small and large quark velocities. I show that the method works
exceedingly well at two and three loops where exact results are already known.
I then present a calculation of the massive cusp anomalous dimension using its
asymptotics at four loops, and I provide a detailed study of the results for
different values of the number of flavors and for separate color structures.
The method can be further extended and applied to higher numbers of loops.
