Below-knee amputation with a stump that does not support a prosthesis well.
To support a 60% rating under this code, evidence needs to show two things: that your below-knee amputation stump is defective, and that a physician has recommended amputation at the thigh level because of that defect. Medical records documenting the condition of the stump are central — this includes examination findings describing problems such as skin breakdown, poor healing, chronic infection, bone spurs, painful scarring, or other stump complications that make the current level of amputation unworkable. A physician's written recommendation or surgical consultation specifically advising thigh-level amputation would directly address the second criterion. Your own statements describing how the stump affects your ability to use a prosthesis and carry out daily activities can help show the functional impact, but the medical recommendation for a higher amputation is the core requirement the evidence must establish.
Conditions that are often caused or made worse by this one. If you have any of these, they may be claimable as secondary service connection.