ICD-10-CM Codes
V00-Y99 External causes of morbidity
W85-W99 Exposure to electric current, radiation and extreme ambient air temperature and pressure
W94- Exposure to high and low air pressure and changes in air pressure
2021 ICD-10-CM Diagnosis Code W94.11

2021 ICD-10-CM Diagnosis Code W94.11

Exposure to residence or prolonged visit at high altitude

2016

2017

2018

2019

2020

2021

Non-Billable/Non-Specific Code

W94.11 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 W94.11 became effective on October 1, 2020.
This is the American ICD-10-CM version of W94.11 - other international versions of ICD-10 W94.11 may differ.

ICD-10-CM Coding Rules

W94.11 describes the circumstance causing an injury, not the nature of the injury.

The following code(s) above W94.11 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 W94.11:

V00-Y99
2021 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
2021 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
2021 (effective 10/1/2020): No change

External Cause Index entries containing back-references to W94.11:

Air
- pressure
  - low, prolonged W94.12
    ICD-10-CM Diagnosis Code W94.12
    Exposure to other prolonged low air pressure
    2016 2017 2018 2019 2020 2021 Non-Billable/Non-Specific Code
    - due to residence or long visit at high altitude W94.11
Alpine sickness W94.11
Altitude sickness W94.11
Andes disease W94.11
Disease
- Andes W94.11
- range W94.11
Mountain sickness W94.11
Prolonged
- stay in
  - high altitude as cause of anoxia, barodontalgia, barotitis or hypoxia W94.11
Range disease W94.11
Sickness
- alpine W94.11
- mountain W94.11

ICD-10-CM Codes Adjacent To W94.11

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

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

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

2021 ICD-10-CM Diagnosis Code W94.11

Exposure to residence or prolonged visit at high altitude

External causes of morbidity

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

Exposure to other prolonged low air pressure