Poisoning by electrolytic/caloric/wtr-bal agnt, undet, subs

This code signifies a poisoning event involving substances that disrupt the body's electrolyte, caloric, or water balance, where the intent of the poisoning (e.g., accidental, intentional self-harm, assault) cannot be determined. It specifically applies when the patient is receiving follow-up care for the sequelae of this poisoning after the initial active treatment has concluded.

Use this code for subsequent encounters when a patient is being monitored or treated for lingering effects of an undetermined poisoning by agents like diuretics, laxatives, or substances causing dehydration or overhydration. This could include follow-up appointments for electrolyte imbalances, renal dysfunction, or cardiac arrhythmias resulting from the initial poisoning.

• This "D" seventh character indicates a subsequent encounter, meaning the patient is receiving routine care during the healing or recovery phase.
• Always assign an additional code for the specific substance if known, and any associated manifestations or complications of the poisoning.
• Ensure the documentation clearly supports that the intent of the poisoning is undetermined, and that the encounter is not for initial active treatment.