2020 ICD-10-CM Diagnosis Code W94

Exposure to high and low air pressure and changes in air pressure

    2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
  • W94 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • Short description: Expsr to high and low air pressr and changes in air pressure
  • The 2020 edition of ICD-10-CM W94 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of W94 - other international versions of ICD-10 W94 may differ.
ICD-10-CM Coding Rules
  • W94 describes the circumstance causing an injury, not the nature of the injury.
The following code(s) above W94 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 W94:
  • V00-Y99
    2020 ICD-10-CM Range V00-Y99

    External causes of morbidity

    Note
    • This chapter permits the classification of environmental events and circumstances as the cause of injury, and other adverse effects. Where a code from this section is applicable, it is intended that it shall be used secondary to a code from another chapter of the Classification indicating the nature of the condition. Most often, the condition will be classifiable to Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88). Other conditions that may be stated to be due to external causes are classified in Chapters I to XVIII. For these conditions, codes from Chapter 20 should be used to provide additional information as to the cause of the condition.
    External causes of morbidity
  • W85-W99
    2020 ICD-10-CM Range W85-W99

    Exposure to electric current, radiation and extreme ambient air temperature and pressure

    Type 1 Excludes
    • exposure to:
    • failure in dosage of radiation or temperature during surgical and medical care (Y63.2-Y63.5)
    • lightning (T75.0-)
    • natural cold (X31)
    • natural heat (X30)
    • natural radiation NOS (X39)
    • radiological procedure and radiotherapy (Y84.2)
    • sunlight (X32)
    Exposure to electric current, radiation and extreme ambient air temperature and pressure
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
Code annotations containing back-references to W94:
  • Type 1 Excludes: V97.8
    , W16
    ICD-10-CM Diagnosis Code V97.8

    Other air transport accidents, not elsewhere classified

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • aircraft accident NOS (V95.9)
    • exposure to changes in air pressure during ascent or descent (W94.-)
    ICD-10-CM Diagnosis Code W16

    Fall, jump or diving into water

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • accidental non-watercraft drowning and submersion not involving fall (W65-W74)
    • effects of air pressure from diving (W94.-)
    • fall into water from watercraft (V90-V94)
    • hitting an object or against bottom when falling from watercraft (V94.0)
    Type 2 Excludes
    • striking or hitting diving board (W21.4)
ICD-10-CM Codes Adjacent To W94
W93.12XD …… subsequent encounter
W93.12XS …… sequela
W93.2 Prolonged exposure in deep freeze unit or refrigerator
W93.2XXA …… initial encounter
W93.2XXD …… subsequent encounter
W93.2XXS …… sequela
W93.8 Exposure to other excessive cold of man-made origin
W93.8XXA …… initial encounter
W93.8XXD …… subsequent encounter
W93.8XXS …… sequela
W94 Exposure to high and low air pressure and changes in air pressure
W94.0 Exposure to prolonged high air pressure
W94.0XXA …… initial encounter
W94.0XXD …… subsequent encounter
W94.0XXS …… sequela
W94.1 Exposure to prolonged low air pressure
W94.11 Exposure to residence or prolonged visit at high altitude
W94.11XA …… initial encounter
W94.11XD …… subsequent encounter
W94.11XS …… sequela
W94.12 Exposure to other prolonged low air pressure

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