ICD-10-CM Code T65.821

Toxic effect of harmful algae and algae toxins, accidental (unintentional)

Version 2020 Non-Billable Code Poisoning Accidental

Not Valid for Submission

T65.821 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of toxic effect of harmful algae and algae toxins, accidental (unintentional). The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code T65.821 might also be used to specify conditions or terms like algae poisoning or azaspiracid poisoning or microcystis flos-aquae poisoning or microcystis species poisoning.

ICD-10:T65.821
Short Description:Toxic effect of harmful algae and algae toxins, accidental
Long Description:Toxic effect of harmful algae and algae toxins, accidental (unintentional)

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

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 T65.821:

Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • Toxic effect of harmful algae and algae toxins NOS

Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Algae poisoning
  • Azaspiracid poisoning
  • Microcystis flos-aquae poisoning
  • Microcystis species poisoning

Code Classification

  • Injury, poisoning and certain other consequences of external causes (S00–T98)
    • Toxic effects of substances chiefly nonmedicinal as to source (T51-T65)
      • Toxic effect of other and unspecified substances (T65)

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

Table of Drugs and Chemicals

The code T65.821 is included 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. Each substance in the table is assigned a code according to the poisoning classification and external causes of adverse effects. Use as many codes as necessary to describe all reported drugs, medicinal or chemical substances.

Substance Poisoning
Accidental
(unintentional)
Poisoning
Accidental
self-harm
Poisoning
Assault
Poisoning
Undetermined
Adverse
effect
Underdosing
Algae (harmful) (toxin)T65.821T65.822T65.823T65.824