Contact with unspecified machinery, subsequent encounter

This code signifies an injury or adverse health effect resulting from contact with any type of machinery that is not specified, during a follow-up visit. It indicates that the patient is receiving ongoing care for an injury that occurred due to an interaction with an unknown or unidentifiable machine.

This code is appropriate for use on claims for subsequent encounters (e.g., follow-up appointments, rehabilitation, medication refills) related to an injury caused by unspecified machinery. It should be used when the initial injury has already been treated and the patient is returning for further management.

• Always ensure the "D" seventh character is appropriate for a subsequent encounter.
• Only use this code when the specific type of machinery involved in the injury cannot be determined or documented.
• If the type of machinery is known, a more specific W31.x code should be utilized.