2025 ICD-10-CM code T46.1

Poisoning by, adverse effect of, and underdosing of calcium-channel blockers.

Use a secondary code from Chapter 20 (External causes of morbidity) to indicate the cause of the injury, unless the circumstances are included in a combination code. If a foreign body is retained, use an additional code from Z18.-.

Yes, for external cause codes, if applicable. Use iFrameAi to check for updates and verify specific modifier applications.

Medical necessity is established by the presence of signs and symptoms of poisoning, adverse effects, or underdosing related to the use of calcium channel blockers.The documentation should support the need for the level of care provided.

The provider's responsibility is to document the type of calcium channel blocker, the amount ingested (if applicable), the route of exposure, and the resulting symptoms.Treatment provided and patient response should also be thoroughly documented.

In simple words: This code indicates poisoning, adverse reaction, or underdose related to calcium channel blocker medications.

This code represents a toxic effect from an overdose, wrong substance given or taken in error, or underdosing of calcium-channel blockers. This includes adverse effects of the correct substance properly administered.

Example 1: A patient intentionally overdoses on amlodipine and presents to the ED with hypotension and bradycardia., A patient is mistakenly given a double dose of diltiazem and experiences dizziness and nausea., A patient with a prescription for verapamil admits to taking less than the prescribed amount and reports experiencing uncontrolled hypertension.

Documentation should include the specific calcium channel blocker involved, the circumstances of the poisoning (accidental, intentional, assault, undetermined), the route of exposure (ingestion, injection, etc.), the amount of substance involved (if known), and the clinical manifestations of the poisoning.Any treatment provided and the patient's response to treatment should also be documented.

** For adverse effects, code first the nature of the adverse effect. The drug causing the adverse effect should be identified using codes T36-T50 with fifth or sixth character 5. Use additional codes to specify manifestations of poisoning and/or underdosing (Y63.6, Y63.8-Y63.9, Z91.12-, Z91.13-).

  • Payment Status: Billable
  • Specialties:Emergency Medicine, Medical Toxicology, Cardiology, Internal Medicine
  • Place of Service:Inpatient Hospital, Emergency Room - Hospital, Office, Other Place of Service
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