Other chondrocalcinosis, unspecified shoulder

This code signifies a form of crystal deposition arthritis, specifically chondrocalcinosis, affecting an unspecified shoulder joint. It indicates the presence of calcium pyrophosphate dihydrate (CPPD) crystals within the cartilage, leading to inflammatory and degenerative changes. This condition is distinct from gout, which involves uric acid crystals.

Use this code when documentation confirms chondrocalcinosis in a patient's shoulder, but the specific shoulder (left or right) is not documented. This diagnosis is typically supported by imaging studies (e.g., X-ray showing chondrocalcinosis) and/or synovial fluid analysis revealing CPPD crystals.

• Ensure the documentation clearly states "chondrocalcinosis" and specifies the shoulder as the affected joint.
• Avoid using this code if the laterality (left or right shoulder) is specified; instead, use the more specific M11.211 or M11.212.
• Do not confuse with other arthropathies like osteoarthritis (M19.-) or gout (M10.-), which have distinct crystal compositions and coding.