Sprain of anterior cruciate ligament of unsp knee, sequela

This code signifies a long-term complication or residual effect stemming from a prior anterior cruciate ligament (ACL) sprain in an unspecified knee. It indicates that the patient is experiencing ongoing issues directly attributable to an old ACL injury, rather than an acute event. These sequelae could include chronic instability, pain, or functional limitations.

Use this code when documenting a patient presenting with a current condition that is a direct consequence of a previously sustained ACL sprain in an unspecified knee, and the initial injury is no longer acute. This applies to follow-up encounters where the focus is on managing the chronic effects of the old injury. It should be assigned after the acute phase of the injury has passed.

• Always assign a sequela code as a secondary diagnosis, with the primary diagnosis reflecting the current manifestation of the sequela (e.g., chronic knee pain, instability).
• Ensure documentation clearly links the current condition to a prior ACL sprain of the unspecified knee.
• Do not use this code for acute or subacute ACL sprains; those require codes from the initial encounter or subsequent encounter categories.