ICD-10-CM Code T45.2

Poisoning by, adverse effect of and underdosing of vitamins

Version 2020 Replaced Code Non-Billable Code

Not Valid for Submission

T45.2 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of poisoning by, adverse effect of and underdosing of vitamins. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

ICD-10:T45.2
Short Description:Poisoning by, adverse effect of and underdosing of vitamins
Long Description:Poisoning by, adverse effect of and underdosing of vitamins

Consider the following ICD-10 codes with a higher level of specificity:

  • T45.2X - Poisoning by, adverse effect of and underdosing of vitamins
  • T45.2X1 - Poisoning by vitamins, accidental (unintentional)
  • T45.2X1A - Poisoning by vitamins, accidental (unintentional), initial encounter
  • T45.2X1D - Poisoning by vitamins, accidental (unintentional), subsequent encounter
  • T45.2X1S - Poisoning by vitamins, accidental (unintentional), sequela
  • T45.2X2 - Poisoning by vitamins, intentional self-harm
  • T45.2X2A - Poisoning by vitamins, intentional self-harm, initial encounter
  • T45.2X2D - Poisoning by vitamins, intentional self-harm, subsequent encounter
  • T45.2X2S - Poisoning by vitamins, intentional self-harm, sequela
  • T45.2X3 - Poisoning by vitamins, assault
  • T45.2X3A - Poisoning by vitamins, assault, initial encounter
  • T45.2X3D - Poisoning by vitamins, assault, subsequent encounter
  • T45.2X3S - Poisoning by vitamins, assault, sequela
  • T45.2X4 - Poisoning by vitamins, undetermined
  • T45.2X4A - Poisoning by vitamins, undetermined, initial encounter
  • T45.2X4D - Poisoning by vitamins, undetermined, subsequent encounter
  • T45.2X4S - Poisoning by vitamins, undetermined, sequela
  • T45.2X5 - Adverse effect of vitamins
  • T45.2X5A - Adverse effect of vitamins, initial encounter
  • T45.2X5D - Adverse effect of vitamins, subsequent encounter
  • T45.2X5S - Adverse effect of vitamins, sequela
  • T45.2X6 - Underdosing of vitamins
  • T45.2X6A - Underdosing of vitamins, initial encounter
  • T45.2X6D - Underdosing of vitamins, subsequent encounter
  • T45.2X6S - Underdosing of vitamins, sequela

Replaced Code

This code was replaced in the 2020 ICD-10 code set with the code(s) listed below. The National Center for Health Statistics (NCHS) has published an update to the ICD-10-CM diagnosis codes which became effective October 1, 2019. This code was replaced for the FY 2020 (October 1, 2019 - September 30, 2020).

  • K59.03 - Drug induced constipation

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code T45.2:

Type 2 Excludes

Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
  • poisoning by, adverse effect of and underdosing of nicotinic acid derivatives T46.7
  • poisoning by, adverse effect of and underdosing of iron T45.4
  • poisoning by, adverse effect of and underdosing of vitamin K T45.7

Code Classification

  • Injury, poisoning and certain other consequences of external causes (S00–T98)
    • Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances (T36-T50)
      • Primarily systemic and hematological agents, NEC (T45)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients


Drug Reactions

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.

One problem is interactions, which may occur between

  • Two drugs, such as aspirin and blood thinners
  • Drugs and food, such as statins and grapefruit
  • Drugs and supplements, such as ginkgo and blood thinners
  • Drugs and diseases, such as aspirin and peptic ulcers

Interactions can change the actions of one or both drugs. The drugs might not work, or you could get side effects.

Side effects are unwanted effects caused by the drugs. Most are mild, such as a stomach aches or drowsiness, and go away after you stop taking the drug. Others can be more serious.

Drug allergies are another type of reaction. They can be mild or life-threatening. Skin reactions, such as hives and rashes, are the most common type. Anaphylaxis, a serious allergic reaction, is more rare.

When you start a new prescription or over-the-counter medication, make sure you understand how to take it correctly. Know which other medications and foods you need to avoid. Ask your health care provider or pharmacist if you have questions.


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