Other specified crystal arthropathies, unspecified shoulder

This code signifies an inflammatory joint condition of the shoulder caused by the deposition of crystals other than those associated with gout or pseudogout. It represents a form of crystal-induced arthritis where the specific type of crystal has been identified but does not fall into the more common categories.

Use this code when documentation specifies a crystal arthropathy affecting the shoulder, and the crystal type is identified but is not uric acid (gout) or calcium pyrophosphate dihydrate (CPPD). This diagnosis is typically supported by synovial fluid analysis revealing atypical crystals or imaging findings consistent with a non-gout/non-CPPD crystal deposition disease.

• Ensure the documentation explicitly states "other specified crystal arthropathy" and specifies the shoulder as the affected joint.
• Avoid using this code if the crystal type is unknown; instead, consider an unspecified crystal arthropathy code.
• Do not use for gouty arthritis (M10.-) or calcium pyrophosphate deposition disease (M11.1-).