Unspecified injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, unspecified leg, sequela

S86.209S (“Unspecified injury of muscle(s) and tendon(s) of anterior muscle group at lower leg level, unspecified leg, sequela”) is a diagnosis code that identifies a specific condition, injury, or finding on a medical claim in the ICD-10-CM code set. Whether it is billed — and whether a payer covers it — depends on the clinical setting, documentation, and plan rules.