ICD-10 Diagnosis Code T65.821

Toxic effect of harmful algae and algae toxins, accidental

Diagnosis Code T65.821

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)
This is the 2017 version of the ICD-10-CM diagnosis code T65.821

Not Valid for Submission
The code T65.821 is a "header" and not valid for submission for HIPAA-covered transactions.

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)

Information for Medical Professionals

Convert to ICD-9 Additional informationCallout TooltipGeneral Equivalence Map
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

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

Index of Diseases and Injuries
References found for the code T65.821 in the Index of Diseases and Injuries:

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
Algae (harmful) (toxin)T65.821T65.822T65.823T65.824
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