Hydroxyapatite deposition disease, left knee

This code signifies a condition characterized by the deposition of calcium hydroxyapatite crystals within the soft tissues of the left knee, often leading to pain, inflammation, and limited range of motion. It represents a form of crystal arthropathy affecting the joint.

Apply this code when documentation explicitly states hydroxyapatite deposition disease affecting the left knee. Supporting clinical findings may include imaging reports (e.g., X-ray showing calcifications), aspiration of synovial fluid revealing hydroxyapatite crystals, and symptoms localized to the left knee.

• Ensure laterality is clearly documented as "left knee" to support this specific code.
• Distinguish from other crystal arthropathies like gout or pseudogout, which have different ICD-10-CM codes.
• Code any associated symptoms (e.g., pain, swelling) separately if they provide additional specificity or are treated independently.