HCPCS modifier › K codes › K4
K4
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.
ValidHCPCS Level II modifier.
Valid for claims with a date of service in the current code year.