Other specified systemic involvement of connective tissue

This code signifies systemic involvement of connective tissue that does not fit into more specific categories of connective tissue diseases. It encompasses conditions affecting multiple organ systems due to a generalized connective tissue disorder, but which are not otherwise classified. This diagnosis indicates a diffuse process impacting various tissues throughout the body.

Apply this code when documentation clearly indicates a systemic connective tissue disorder with multi-organ involvement, but a more precise ICD-10-CM code is unavailable. This is appropriate for conditions like undifferentiated connective tissue disease (UCTD) or mixed connective tissue disease (MCTD) when the specific criteria for those are not fully met or documented. Supporting documentation should detail systemic manifestations and rule out more specific diagnoses.

• Avoid using this code if a more specific systemic connective tissue disease (e.g., lupus, scleroderma, Sjögren's) is documented.
• Always review the entire medical record to ensure no other, more precise code can be assigned.
• Consider sequencing this code after any specific organ manifestations if they are the primary reason for the encounter.