Insect bite (nonvenomous), unspecified knee, sequela

This code signifies a lasting health condition or complication resulting from a nonvenomous insect bite that occurred on an unspecified knee. It indicates that the acute phase of the bite has passed, and the patient is now experiencing a residual effect, such as scarring, chronic dermatitis, or persistent pain directly attributable to the original bite.

Apply this code when documenting a patient presenting with a chronic or residual issue on the knee, where the etiology is clearly linked to a past nonvenomous insect bite. This is appropriate for follow-up visits addressing long-term sequelae rather than the initial acute injury.

• Ensure documentation explicitly states the knee as the affected site and confirms the insect bite was nonvenomous.
• Always use this code as a secondary diagnosis, following the code for the specific sequela (e.g., L90.5 for scar conditions, L30.9 for unspecified dermatitis).
• The "S" seventh character indicates a sequela, meaning it should be used for conditions that are the late effects of the initial injury.