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  6. 2024 ICD-10-CM Code T65.82
Version 2024
Non-Billable Code

2024 ICD-10-CM Diagnosis Code T65.82

Toxic effect of harmful algae and algae toxins

ICD-10-CM Code:
T65.82
ICD-10 Code for:
Toxic effect of harmful algae and algae toxins
Is Billable?
Not Valid for Submission
Code Navigator:

Code Classification

  • Injury, poisoning and certain other consequences of external causes
    (S00–T88)
    • Toxic effects of substances chiefly nonmedicinal as to source
      (T51-T65)
      • Toxic effect of other and unspecified substances
        (T65)

T65.82 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of toxic effect of harmful algae and algae toxins. The code is not specific and is NOT valid for the year 2024 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Toxic effect of harmful algae and algae toxins

Non-specific codes like T65.82 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for toxic effect of harmful algae and algae toxins:

  • T65.821 for Toxic effect of harmful algae and algae toxins, accidental (unintentional) - NON-BILLABLE CODE

  • Use T65.821A for initial encounter - BILLABLE CODE

  • Use T65.821D for subsequent encounter - BILLABLE CODE

  • Use T65.821S for sequela - BILLABLE CODE

  • T65.822 for Toxic effect of harmful algae and algae toxins, intentional self-harm - NON-BILLABLE CODE

  • Use T65.822A for initial encounter - BILLABLE CODE

  • Use T65.822D for subsequent encounter - BILLABLE CODE

  • Use T65.822S for sequela - BILLABLE CODE

  • T65.823 for Toxic effect of harmful algae and algae toxins, assault - NON-BILLABLE CODE

  • Use T65.823A for initial encounter - BILLABLE CODE

  • Use T65.823D for subsequent encounter - BILLABLE CODE

  • Use T65.823S for sequela - BILLABLE CODE

  • T65.824 for Toxic effect of harmful algae and algae toxins, undetermined - NON-BILLABLE CODE

  • Use T65.824A for initial encounter - BILLABLE CODE

  • Use T65.824D for subsequent encounter - BILLABLE CODE

  • Use T65.824S for sequela - BILLABLE CODE

Coding Guidelines

The appropriate 7th character is to be added to each code from block Toxic effect of other and unspecified substances (T65). Use the following options for the aplicable episode of care:

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


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 bloom NOS
  • Toxic effect of blue-green algae bloom
  • Toxic effect of brown tide
  • Toxic effect of cyanobacteria bloom
  • Toxic effect of Florida red tide
  • Toxic effect of pfiesteria piscicida
  • Toxic effect of red tide

Index to Diseases and Injuries References

The following annotation back-references for this diagnosis code are found in the injuries and diseases index. The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10-CM code(s).

  • - Red tide - See Also: Table of Drugs and Chemicals; - T65.82

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • 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. This was the first year ICD-10-CM was implemented into the HIPAA code set.