2021

  1. ICD-10-CM Codes
    2. ›
  2. S00-T88 Injury, poisoning and certain other consequences of external causes
    3. ›
  3. T66-T78 Other and unspecified effects of external causes
    4. ›
  4. T70- Effects of air pressure and water pressure
    5. ›
  5. 2021 ICD-10-CM Diagnosis Code T70.2

2021 ICD-10-CM Diagnosis Code T70.2

Other and unspecified effects of high altitude

    2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
  • T70.2 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 T70.2 became effective on October 1, 2020.
  • This is the American ICD-10-CM version of T70.2 - other international versions of ICD-10 T70.2 may differ.
Type 2 Excludes
Type 2 Excludes Help
A type 2 excludes note represents "not included here". A type 2 excludes note indicates that the condition excluded is not part of the condition it is excluded from but a patient may have both conditions at the same time. When a type 2 excludes note appears under a code it is acceptable to use both the code (T70.2) and the excluded code together.
  • polycythemia due to high altitude (
    ICD-10-CM Diagnosis Code D75.1

    Secondary polycythemia

      2016 2017 2018 2019 2020 2021 Billable/Specific Code
    Applicable To
    • Acquired polycythemia
    • Emotional polycythemia
    • Erythrocytosis NOS
    • Hypoxemic polycythemia
    • Nephrogenous polycythemia
    • Polycythemia due to erythropoietin
    • Polycythemia due to fall in plasma volume
    • Polycythemia due to high altitude
    • Polycythemia due to stress
    • Polycythemia NOS
    • Relative polycythemia
    Type 1 Excludes
    • polycythemia neonatorum (P61.1)
    • polycythemia vera (D45)
    D75.1
    )
The following code(s) above T70.2 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 T70.2:
  • 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
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 T70.2:
  • Type 1 Excludes: T71
    ICD-10-CM Diagnosis Code T71

    Asphyxiation

      2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    Applicable To
    • Mechanical suffocation
    • Traumatic suffocation
    Type 1 Excludes
    • acute respiratory distress (syndrome) (J80)
    • anoxia due to high altitude (T70.2)
    • asphyxia NOS (R09.01)
    • asphyxia from carbon monoxide (T58.-)
    • asphyxia from inhalation of food or foreign body (T17.-)
    • asphyxia from other gases, fumes and vapors (T59.-)
    • respiratory distress (syndrome) in newborn (P22.-)
ICD-10-CM Codes Adjacent To T70.2
T69.9XXS …… sequela
T70 Effects of air pressure and water pressure
T70.0 Otitic barotrauma
T70.0XXA …… initial encounter
T70.0XXD …… subsequent encounter
T70.0XXS …… sequela
T70.1 Sinus barotrauma
T70.1XXA …… initial encounter
T70.1XXD …… subsequent encounter
T70.1XXS …… sequela
T70.2 Other and unspecified effects of high altitude
T70.20 Unspecified effects of high altitude
T70.20XA …… initial encounter
T70.20XD …… subsequent encounter
T70.20XS …… sequela
T70.29 Other effects of high altitude
T70.29XA …… initial encounter
T70.29XD …… subsequent encounter
T70.29XS …… sequela
T70.3 Caisson disease [decompression sickness]
T70.3XXA …… 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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