Familial chondrocalcinosis, left knee

This code signifies a hereditary condition characterized by the deposition of calcium pyrophosphate crystals within the cartilage of the left knee joint. This crystal deposition leads to inflammation, pain, and degenerative changes, often mimicking osteoarthritis.

Apply this code when documentation explicitly states a diagnosis of familial chondrocalcinosis affecting the left knee. Supporting documentation should include a family history of chondrocalcinosis, clinical findings consistent with crystal arthropathy in the left knee, and potentially imaging reports showing chondrocalcinosis.

• Ensure the documentation specifies "familial" to differentiate from other forms of chondrocalcinosis.
• Verify the laterality is precisely documented as "left knee."
• Do not use this code for pseudogout without documented familial etiology.