Familial chondrocalcinosis, right knee

This code signifies a genetic disorder characterized by the deposition of calcium pyrophosphate crystals in the cartilage of the right knee joint. This crystal deposition leads to inflammation and degenerative changes within the joint. It is distinct from sporadic chondrocalcinosis as it has a clear hereditary pattern.

Apply this code when documentation confirms a diagnosis of chondrocalcinosis affecting the right knee, specifically noting a familial or hereditary component. This diagnosis is typically supported by imaging (e.g., X-rays showing chondrocalcinosis) and a patient history indicating a family history of the condition.

• Ensure documentation explicitly states "familial" or "hereditary" to differentiate from other forms of chondrocalcinosis.
• Laterality is crucial; confirm the right knee is the affected joint.
• Do not confuse with M11.162 (familial chondrocalcinosis, left knee) or M11.169 (familial chondrocalcinosis, unspecified knee).