Other specified crystal arthropathies, left hand

This diagnosis code signifies a crystal-induced arthritis affecting the left hand, where the specific type of crystal deposition is known but does not fall under gout, pseudogout, or other explicitly classified crystal arthropathies. It indicates an inflammatory joint condition caused by the presence of abnormal crystal formations within the synovial fluid or joint tissues of the left hand.

Use this code when documentation clearly identifies a crystal arthropathy of the left hand that is not gout (monosodium urate), pseudogout (calcium pyrophosphate dihydrate), or another specified type with its own unique code. Supporting documentation would include synovial fluid analysis identifying a specific crystal type (e.g., calcium oxalate, cholesterol) or biopsy results confirming a crystal deposition disease in the left hand.

• Ensure the documentation specifies "left hand" and a crystal type that is not otherwise classified.
• Do not use this code for unspecified crystal arthropathies; a more specific code (M11.9-) would be appropriate if the crystal type is unknown.
• Consider sequencing this code after any underlying systemic conditions that may predispose to crystal formation, if applicable.