Insect bite (nonvenomous), unspecified foot, subs encntr

This code signifies a non-toxic insect bite on an unspecfied foot that is currently undergoing active treatment or healing. It indicates that the initial treatment has already been provided, and the patient is returning for follow-up care related to the bite.

Apply this code when a patient presents for a follow-up visit for a nonvenomous insect bite on their foot, and the specific foot (left or right) is not documented. This includes scenarios such as wound checks, dressing changes, or monitoring for infection after the initial encounter.

• Ensure documentation clearly states "subsequent encounter" or similar language indicating ongoing care.
• If the specific foot is known (left or right), use the more specific code (S90.861D or S90.862D).
• Always code the type of insect bite (e.g., nonvenomous) and the anatomical site accurately.