Sprain of unsp cruciate ligament of unsp knee, sequela

This code signifies a past injury to an unknown cruciate ligament within an unspecified knee joint, where the patient is now experiencing residual effects or complications directly attributable to that original sprain. These sequelae could include chronic pain, instability, limited range of motion, or other long-term issues.

Apply this code when documentation clearly indicates a prior, unspecified cruciate ligament sprain of an unspecified knee, and the current encounter addresses a condition that is a direct consequence or late effect of that original injury. This is appropriate for follow-up visits or treatment for chronic problems stemming from the old injury.

• Ensure the "S" seventh character for sequela is explicitly supported by documentation of a past injury and current residual condition.
• Avoid using this code if the specific cruciate ligament (e.g., anterior, posterior) or the specific knee (left, right) is known; more specific codes exist.
• Always code the current manifestation or complication of the sequela first, followed by this code to indicate the underlying cause.