HCPCS Code: K4
Long Description: Lower extremity prosthesis functional level 4 - has the ability or potential for prosthetic ambulation that exceeds the basic ambulation skills, exhibiting high impact, stress, or energy levels, typical of the prosthetic demands of the child, active adult, or athlete.
Short Description: Lwr ext prost functnl lvl 4
Original information is taken from K4 page