T43

Non-billable

Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified

T43 is the ICD-10-CM code for Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified. It is a non-billable category code — use a more specific child code such as T43.0 for billing.

Status
Header (non-billable)
Chapter
S00-T88
Subcodes
9
Edition
FY2026

S00-T88 Injury, poisoning and certain other consequences of external causes

What this means — in plain language

MedlinePlus · NIH

Most of the time, medicines make our lives better. They reduce aches and pains, fight infections, and control problems such as high blood pressure or diabetes. But medicines can also cause unwanted reactions, such as drug interactions, side effects, and allergies. What is a drug interaction? A drug interaction is a change in the way a drug acts in the body when taken with certain other drugs, foods, or supplements…

Read more about Drug Reactions at MedlinePlus ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

Excludes1 — not coded here

  • appetite depressants (T50.5-)
  • barbiturates (T42.3-)
  • benzodiazepines (T42.4-)
  • methaqualone (T42.6-)
  • psychodysleptics [hallucinogens] (T40.7-T40.9-)

Excludes2 — not included here

  • drug dependence and related mental and behavioral disorders due to psychoactive substance use (F10.- -F19.-)

Medications indicated for this condition

FDA labeling

Drugs whose FDA labeling lists this condition's category among its indications. Informational only — not a treatment recommendation or medical advice.

Conditions mapped to this code

MedlinePlus · NIH

Plain-language health-topic references grounded in MedlinePlus (NIH/NLM).

Frequently asked questions

What is ICD-10 code T43?
T43 is the ICD-10-CM code for "Poisoning by, adverse effect of and underdosing of psychotropic drugs, not elsewhere classified". It falls under S00-T88 Injury, poisoning and certain other consequences of external causes.
Is T43 a billable code?
No — T43 is a non-billable header code. Use a more specific child code (such as T43.0) for billing.
What are the subcodes of T43?
T43 has 9 more specific child codes, including T43.0, T43.1, T43.2.
What is excluded from T43?
Excludes1 (not coded here): appetite depressants (T50.5-); barbiturates (T42.3-); benzodiazepines (T42.4-); methaqualone (T42.6-).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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