Insect bite (nonvenomous), unspecified knee, init encntr

This code signifies a skin lesion on an unspecified knee resulting from a nonvenomous insect bite. It indicates the initial presentation of the injury, prior to any definitive treatment or healing. The bite is not associated with a toxic reaction from venom.

Apply this code when a patient presents with a fresh, non-toxic insect bite on the knee, and the specific knee (left or right) is not documented. This is appropriate for the initial evaluation and management of such an injury in an outpatient or emergency department setting.

• Ensure documentation specifies "nonvenomous" and "knee" to support this code.
• If the specific knee (left or right) is documented, use the more specific code (S80.261A or S80.262A).
• Append subsequent encounter (D) or sequela (S) characters for follow-up visits or complications, respectively.