2020 ICD-10-CM Diagnosis Code W94.2

Exposure to rapid changes in air pressure during ascent

    2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
  • W94.2 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2020 edition of ICD-10-CM W94.2 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of W94.2 - other international versions of ICD-10 W94.2 may differ.
ICD-10-CM Coding Rules
  • W94.2 describes the circumstance causing an injury, not the nature of the injury.
The following code(s) above W94.2 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 W94.2:
  • 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
ICD-10-CM Codes Adjacent To W94.2
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
W94.12XA …… initial encounter
W94.12XD …… subsequent encounter
W94.12XS …… sequela
W94.2 Exposure to rapid changes in air pressure during ascent
W94.21 Exposure to reduction in atmospheric pressure while surfacing from deep-water diving
W94.21XA …… initial encounter
W94.21XD …… subsequent encounter
W94.21XS …… sequela
W94.22 Exposure to reduction in atmospheric pressure while surfacing from underground
W94.22XA …… initial encounter
W94.22XD …… subsequent encounter
W94.22XS …… sequela
W94.23 Exposure to sudden change in air pressure in aircraft during ascent
W94.23XA …… initial encounter

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