2021

  1. ICD-10-CM Codes
    2. ›
  2. S00-T88 Injury, poisoning and certain other consequences of external causes
    3. ›
  3. T51-T65 Toxic effects of substances chiefly nonmedicinal as to source
    4. ›
  4. T65- Toxic effect of other and unspecified substances
    5. ›
  5. 2021 ICD-10-CM Diagnosis Code T65.82

2021 ICD-10-CM Diagnosis Code T65.82

Toxic effect of harmful algae and algae toxins

    2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
  • T65.82 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2021 edition of ICD-10-CM T65.82 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of T65.82 - other international versions of ICD-10 T65.82 may differ.
Applicable To
  • 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
The following code(s) above T65.82 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to T65.82:
  • S00-T88
    2021 ICD-10-CM Range S00-T88

    Injury, poisoning and certain other consequences of external causes

    Note
    • Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
    Type 1 Excludes
    Use Additional
    • code to identify any retained foreign body, if applicable (Z18.-)
    Injury, poisoning and certain other consequences of external causes
  • T51-T65
    2021 ICD-10-CM Range T51-T65

    Toxic effects of substances chiefly nonmedicinal as to source

    Note
    • When no intent is indicated code to accidental. Undetermined intent is only for use when there is specific documentation in the record that the intent of the toxic effect cannot be determined.
    Type 1 Excludes
    • contact with and (suspected) exposure to toxic substances (Z77.-)
    Use Additional
    • code(s):
    • for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)
    • personal history of foreign body fully removed (Z87.821)
    • to identify any retained foreign body, if applicable (Z18.-)
    Toxic effects of substances chiefly nonmedicinal as to source
Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
Code annotations containing back-references to T65.82:
  • Type 1 Excludes: T61
    , T61
    ICD-10-CM Diagnosis Code T61

    Toxic effect of noxious substances eaten as seafood

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • allergic reaction to food, such as:
    • anaphylactic reaction or shock due to adverse food reaction (T78.0-)
    • bacterial foodborne intoxications (A05.-)
    • dermatitis (L23.6, L25.4, L27.2)
    • food protein-induced enterocolitis syndrome (K52.21)
    • food protein-induced enteropathy (K52.22)
    • gastroenteritis (noninfective) (K52.29)
    • toxic effect of aflatoxin and other mycotoxins (T64)
    • toxic effect of cyanides (T65.0-)
    • toxic effect of harmful algae bloom (T65.82-)
    • toxic effect of hydrogen cyanide (T57.3-)
    • toxic effect of mercury (T56.1-)
    • toxic effect of red tide (T65.82-)
    ICD-10-CM Diagnosis Code T61

    Toxic effect of noxious substances eaten as seafood

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • allergic reaction to food, such as:
    • anaphylactic reaction or shock due to adverse food reaction (T78.0-)
    • bacterial foodborne intoxications (A05.-)
    • dermatitis (L23.6, L25.4, L27.2)
    • food protein-induced enterocolitis syndrome (K52.21)
    • food protein-induced enteropathy (K52.22)
    • gastroenteritis (noninfective) (K52.29)
    • toxic effect of aflatoxin and other mycotoxins (T64)
    • toxic effect of cyanides (T65.0-)
    • toxic effect of harmful algae bloom (T65.82-)
    • toxic effect of hydrogen cyanide (T57.3-)
    • toxic effect of mercury (T56.1-)
    • toxic effect of red tide (T65.82-)

Diagnosis Index entries containing back-references to T65.82:
  • Poisoning (acute) - see also Table of Drugs and Chemicals
    • algae and toxins T65.82-
  • Red tide T65.82- - see also Table of Drugs and Chemicals

ICD-10-CM Codes Adjacent To T65.82
T65.812D …… subsequent encounter
T65.812S …… sequela
T65.813 Toxic effect of latex, assault
T65.813A …… initial encounter
T65.813D …… subsequent encounter
T65.813S …… sequela
T65.814 Toxic effect of latex, undetermined
T65.814A …… initial encounter
T65.814D …… subsequent encounter
T65.814S …… sequela
T65.82 Toxic effect of harmful algae and algae toxins
T65.821 Toxic effect of harmful algae and algae toxins, accidental (unintentional)
T65.821A …… initial encounter
T65.821D …… subsequent encounter
T65.821S …… sequela
T65.822 Toxic effect of harmful algae and algae toxins, intentional self-harm
T65.822A …… initial encounter
T65.822D …… subsequent encounter
T65.822S …… sequela
T65.823 Toxic effect of harmful algae and algae toxins, assault
T65.823A …… initial encounter

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

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