Toxic effect of carb monx from utility gas, undet, init

This code signifies a toxic reaction resulting from exposure to carbon monoxide originating from utility gas, such as natural gas or propane. The circumstances surrounding the exposure are unknown or unspecified, and this code is used for the initial phase of treatment for the poisoning.

Apply this code when a patient presents with symptoms of carbon monoxide poisoning, and the source is identified as utility gas, but the intent (e.g., accidental, intentional) cannot be determined. This is appropriate for the first encounter where the patient is receiving active treatment for the acute effects of the poisoning.

• Always assign an additional code for the specific manifestations of the carbon monoxide poisoning (e.g., anoxic brain damage, cardiac arrhythmias).
• Ensure documentation clearly states "utility gas" as the source and that the intent is "undetermined."
• Do not use this code if the intent (accidental, intentional self-harm, assault) is known; instead, select the appropriate T58.1- subcategory.