Poisoning by calcium-channel blockers, self-harm, init

This diagnosis code signifies a patient presenting with adverse effects from an overdose of calcium-channel blockers, where the ingestion was deliberately self-inflicted with the intent to cause harm. The patient is in the initial phase of receiving active treatment for this poisoning.

This code is appropriate for emergency department visits or initial inpatient admissions where a patient has intentionally taken an excessive dose of calcium-channel blocker medication. It applies when the primary reason for the encounter is the acute management of the resulting toxic effects.

• Always assign an additional code for the specific calcium-channel blocker involved, if known (e.g., from the T36-T50 range).
• Ensure documentation clearly supports "intentional self-harm" and "initial encounter" to justify this specific subcategory.
• Do not use for accidental poisonings or adverse effects from therapeutic use; different codes apply for those scenarios.