Outcome Measures in Lower Limb Prosthetics



K-Levels

K-Levels: K-levels are defined by Medicare based on an individual's ability or potential to ambulate and navigate their environment. Once it is determined in which K-level an individual resides, it can be determined which prosthetic components are covered by Medicare.

K-LevelDescriptionFoot/Ankle AssembliesKnee Units
K0This patient does not have the ability or potential to ambulate or transfer safely with or without assistance and a prosthesis does not enhance their quality of life or mobility.Not eligible for prosthesisNot eligible for prosthesis
K1This patient has the ability or potential to use a prosthesis for transfers or ambulation on level surfaces at fixed cadence - a typical limited or unlimited household ambulator.External keel, SACH feet or single axis ankle/feetSingle-axis, constant friction knee
K2This patient has the ability or potential for ambulation with the ability to traverse low-level environmental barriers such as curbs, stairs, or uneven surfaces - a typical community ambulator.Flexible-keel feet and multi-axial ankle/feetSingle-axis, constant friction knee
K3The patient has the ability or potential for ambulation with variable cadence - a typical community ambulator with the ability to traverse most environmental barriers and may have vocational, herapeutic, or exercise activity that demands prosthetic use beyond simple locomotion.Flex foot and flex-walk systems, energy storing feet, multi-axial ankle/feet, or dynamic response feetFluid and pneumatic control knees
K4The patient has the ability or potential for prosthetic ambulation that exceeds basic ambulation skills, exhibiting high impact, stress, or energy levels - typical of the prosthetic demands of the child, active adult, or athlete.Any ankle foot system appropriateAny ankle knee system appropriate

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