Other chondrocalcinosis, left shoulder

This code signifies the presence of calcium pyrophosphate dihydrate (CPPD) crystal deposition disease, also known as pseudogout, affecting the left shoulder joint. This condition leads to inflammation and degenerative changes within the joint due to the accumulation of these crystals.

Use this code when documentation explicitly states a diagnosis of chondrocalcinosis or pseudogout specifically affecting the left shoulder, and it is not specified as familial or due to trauma. Supporting documentation would include physician notes detailing crystal identification (e.g., synovial fluid analysis) or characteristic radiographic findings in the left shoulder.

• Ensure the laterality (left shoulder) is clearly documented.
• Distinguish from primary or familial chondrocalcinosis (M11.1-) and post-traumatic chondrocalcinosis (M11.27-).
• Code any associated osteoarthritis (e.g., M19.90) or other joint pathologies separately.