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2025 ICD-10-CM code T46.5X3S

Poisoning by other antihypertensive drugs, assault, sequela.

Code first the nature of the adverse effect. An additional external cause code from Chapter 20 should be used to identify the cause of the injury, except for codes within the T section that already include the external cause.

Medical necessity is established by the documented link between the assault/poisoning incident and the subsequent long-term health consequences.

IMPORTANT Use secondary code(s) from Chapter 20, External causes of morbidity (V01-Y99), to indicate cause of injury. Use additional code to identify any retained foreign body, if applicable (Z18.-).

In simple words: This code indicates a long-term health problem that is the result of a past assault involving poisoning with antihypertensive medication (other than beta-blockers, calcium channel blockers, or diuretics).

This code represents a sequela (late effect) resulting from poisoning by antihypertensive drugs, due to an assault. It excludes poisoning by beta-adrenoreceptor antagonists (T44.7), calcium-channel blockers (T46.1), and diuretics (T50.0-T50.2).

Example 1: A patient was assaulted and forcibly given an overdose of an antihypertensive medication (other than a beta-blocker, calcium channel blocker, or diuretic). They survived the initial poisoning but now experience chronic kidney disease as a direct result of the incident., A victim of a robbery was unknowingly given a poisoned drink containing antihypertensive drugs (excluding specified types). Though they recovered from the acute poisoning, they now suffer from persistent neurological deficits., A person was attacked and injected with an unknown substance later identified as an antihypertensive drug (not a beta-blocker, calcium channel blocker, or diuretic). They experience long-term cardiac issues as a sequela of the poisoning.

Documentation should clearly indicate the specific antihypertensive drug involved (if known), evidence of the assault, and the long-term health consequences experienced as a direct result of the poisoning. Any related medical conditions or symptoms contributing to the sequela should also be documented.

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