Disorders of muscle in diseases classd elswhr, left hand

This diagnosis code signifies a muscular disorder affecting the left hand that is secondary to, or a manifestation of, another underlying disease process. This encompasses conditions where the primary disease (e.g., an autoimmune disorder, metabolic disease, or infectious disease) directly causes or contributes to muscle pathology in the left hand.

Use this code when documentation clearly indicates a muscle disorder of the left hand that is a complication or symptom of another systemic or localized disease. The medical record should specify the primary underlying condition, which will be coded first, followed by this code to describe the specific muscular involvement. Examples include myopathy of the left hand due to lupus or a metabolic myopathy affecting the left hand.

• Always sequence the underlying primary disease code first, as this code is for a manifestation.
• Ensure documentation specifies "left hand" to support the laterality; otherwise, an unspecified laterality code may be more appropriate.
• Distinguish from primary muscle disorders (e.g., myositis not secondary to another disease) or nerve entrapment syndromes.