Unequal limb length (acquired), right humerus

This code signifies a measurable difference in length between the right humerus and its contralateral counterpart that developed after birth. This discrepancy can result from various factors such as trauma, infection, or surgical intervention affecting the growth plate or bone remodeling processes.

Apply this code when documentation clearly indicates an acquired shortening or lengthening of the right humerus. This typically occurs following fractures, osteomyelitis, or surgical procedures like tumor resection or limb lengthening/shortening, where a measurable difference in humeral length is noted.

• Ensure documentation specifies "acquired" to differentiate from congenital limb length discrepancies.
• Verify the laterality is explicitly stated as "right humerus."
• Do not confuse with M21.70 (unequal limb length, unspecified site) or M21.722 (unequal limb length, acquired, left humerus).