2022 ICD-10-CM Code T50.B91A
Poisoning by other viral vaccines, accidental (unintentional), initial encounter

Version 2022
Short Description:Poisoning by oth viral vaccines, accidental, init
Long Description:Poisoning by other viral vaccines, accidental (unintentional), initial encounter
Status: Valid for Submission

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)
      • Diuretics and oth and unsp drug/meds/biol subst (T50)

T50.B91A is a billable diagnosis code used to specify a medical diagnosis of poisoning by other viral vaccines, accidental (unintentional), initial encounter. The code T50.B91A is valid during the fiscal year 2022 from October 01, 2021 through September 30, 2022 for the submission of HIPAA-covered transactions.

T50.B91A is an initial encounter code, includes a 7th character and should be used while the patient is receiving active treatment for a condition like poisoning by other viral vaccines accidental (unintentional). According to ICD-10-CM Guidelines an "initial encounter" doesn't necessarily means "initial visit". The 7th character should be used when the patient is undergoing active treatment regardless if new or different providers saw the patient over the course of a treatment. The appropriate 7th character codes should also be used even if the patient delayed seeking treatment for a condition.

Coding Guidelines

When coding a poisoning or reaction to the improper use of a medication (e.g., overdose, wrong substance given or taken in error, wrong route of administration), first assign the appropriate code from categories T36-T50. The poisoning codes have an associated intent as their 5th or 6th character (accidental, intentional self-harm, assault and undetermined. If the intent of the poisoning is unknown or unspecified, code the intent as accidental intent. The undetermined intent is only for use if the documentation in the record specifies that the intent cannot be determined. Use additional code(s) for all manifestations of poisonings.

The appropriate 7th character is to be added to each code from block Diuretics and oth and unsp drug/meds/biol subst (T50). Use the following options for the aplicable episode of care:

Convert T50.B91A to ICD-9 Code

Table of Drugs and Chemicals

The parent code T50.B91 of the current diagnosis code is referenced in the Table of Drugs and Chemicals, this table contains a classification of drugs, industrial solvents, corrosive gases, noxious plants, pesticides, and other toxic agents.

According to ICD-10 coding guidelines it is advised to do not code directly from the Table of Drugs and Chemicals, instead always refer back to the Tabular List when doing the initial coding. Each substance in the table is assigned a code according to the poisoning classification and external causes of adverse effects. It is important to use as many codes as necessary to specify all reported drugs, medicinal or chemical substances. If the same diagnosis code describes the causative agent for more than one adverse reaction, poisoning, toxic effect or underdosing, utilize the code only once.

Substance Poisoning
Influenza vaccineT50.B91T50.B92T50.B93T50.B94T50.B95T50.B96
Measles virus vaccine (attenuated)T50.B91T50.B92T50.B93T50.B94T50.B95T50.B96
Poliomyelitis vaccineT50.B91T50.B92T50.B93T50.B94T50.B95T50.B96
Rubella vaccineT50.B91T50.B92T50.B93T50.B94T50.B95T50.B96
Rubeola vaccineT50.B91T50.B92T50.B93T50.B94T50.B95T50.B96
Viral vaccine NECT50.B91T50.B92T50.B93T50.B94T50.B95T50.B96
  »fever vaccine

Information for Patients

Medication Errors

Medicines treat infectious diseases, prevent problems from chronic diseases, and ease pain. But medicines can also cause harmful reactions if not used correctly. Errors can happen in the hospital, at the health care provider's office, at the pharmacy, or at home. You can help prevent errors by

Food and Drug Administration

[Learn More in MedlinePlus]

Code History

  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016 (First year ICD-10-CM implemented into the HIPAA code set)