Poisn by electrolytic/caloric/wtr-bal agnt, undet, sequela

This code signifies a long-term health condition or complication resulting from a past poisoning event involving substances that affect electrolytes, calories, or water balance. These agents can include diuretics, antacids, or other medications that disrupt the body's fluid and chemical equilibrium, and the original intent of the poisoning (accidental, intentional, therapeutic misadventure) is unknown.

Apply this code when documenting a sequela, or residual effect, of a poisoning by electrolytic, caloric, or water-balance agents, where the circumstances of the original poisoning are not specified or cannot be determined. This is used for conditions that manifest after the acute phase of the poisoning has resolved, such as chronic kidney disease secondary to past diuretic overdose of unknown intent.

• Always use this code as a secondary diagnosis, following the code for the specific sequela.
• Ensure documentation clearly links the current condition to a past poisoning event.
• The "S" in the 7th character indicates sequela; do not use for active poisoning.