Familial chondrocalcinosis, unspecified shoulder

This code signifies a genetic predisposition to calcium pyrophosphate dihydrate (CPPD) crystal deposition in the cartilage of an unspecified shoulder joint. This deposition leads to inflammation and degenerative changes, often presenting as acute arthritic attacks or chronic arthropathy. It is a form of pseudogout with a familial inheritance pattern.

Use this code when documentation explicitly states "familial chondrocalcinosis" affecting the shoulder, and the specific shoulder (left or right) is not documented. This diagnosis is typically supported by imaging findings (e.g., radiographs showing chondrocalcinosis) and a family history of the condition.

• Ensure documentation specifies "familial" to differentiate from idiopathic or secondary chondrocalcinosis.
• Avoid using this code if the specific shoulder (left or right) is identified; instead, use the more specific codes M11.111 or M11.112.
• Consider sequencing this code with codes for associated symptoms like shoulder pain (M25.51-) or osteoarthritis (M19.01-) if present.