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2025 ICD-10-CM code T50.3X4

Poisoning by electrolytic, caloric and water-balance agents, undetermined.

Use a secondary code from Chapter 20 (External causes of morbidity) to indicate the cause of the poisoning, if known (e.g., accidental, intentional self-harm, assault).An additional code can be used to identify any manifestations of the poisoning. If a retained foreign body is applicable, use Z18.-.

7th character is required for this code to specify the encounter (initial, subsequent, or sequela).

Medical necessity is established by the clinical findings supporting a diagnosis of poisoning by electrolytic, caloric and water-balance agents.Abnormal electrolyte levels, vital signs, and physical exam findings indicating toxicity justify the use of this code.

The provider is responsible for documenting the clinical findings supporting the diagnosis of poisoning, including symptoms, history, physical exam, and any available lab results. Any treatment provided should also be documented.

In simple words: This code indicates poisoning from a substance that affects the body's electrolytes, calories, or water balance, but the specific substance is unknown.

This code represents poisoning due to an undetermined electrolytic, caloric, or water-balance agent, and the intent is unknown (whether accidental, intentional self-harm, assault, or undetermined).

Example 1: A patient presents to the emergency department with altered mental status, nausea, and vomiting. Lab results reveal electrolyte abnormalities, but the patient is unable to provide a history of ingestion. In the absence of further information, T50.3X4 is used until a definitive diagnosis can be made., A child is found unconscious near an open container of an unknown white powder.Initial lab results suggest electrolyte disturbances. T50.3X4 is assigned while awaiting toxicology results to confirm the substance., A patient with a history of suicide attempts presents with symptoms consistent with poisoning, including dehydration and electrolyte imbalance.They refuse to disclose what they ingested. T50.3X4 can be used to code the poisoning until more information becomes available.

Documentation should include the patient's symptoms, physical exam findings, lab results (including electrolyte levels), and any available history regarding the ingestion or exposure. Details of treatment provided should also be documented. If the specific agent is later identified, the code should be updated.

** This code should be used when the specific electrolytic, caloric, or water-balance agent is unknown. If the substance is later identified, the code should be updated to the most specific code available.For adverse effects of electrolytic, caloric and water-balance agents, use T50.3X5.

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