ICD-10-CM › V00-Y99 › W85-W99 › W94.31 Exposure to sudden change in air... › W94.31XA

W94.31XA

Exposure to sudden change in air pressure in aircraft during descent, initial encounter

ValidICD-10-CM diagnosis code.

Valid for claims with a date of service in the current code year.

Valid FY2016 onwards.

What has happened to this code

Every change the publisher made, from 2007 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.

  1. FY2007 Added to the draft code set draft Exposure to sudden change in air pressure in aircraft during ascent or descent, initial encounter
  2. FY2014 Draft description revised draft Exposure to sudden change in air pressure in aircraft during ascent or descent, initial encounter Exposure to sudden change in air pressure in aircraft during descent, initial encounter

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

Inherited from W94 Exposure to high and low air pressure and changes in air pressure

Seventh character required

  • The appropriate 7th character is to be added to each code from category W94

Inherited from the W85-W99 section Exposure to electric current, radiation and extreme ambient air temperature and pressure (W85-W99)

Excludes1 - never coded here

  • 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)

How CDC's index refers to this code

Wording from the official alphabetic index. Much of it appears nowhere in the code description, which is why a search for the everyday phrase so often finds nothing.

Codes in the same group

CodeDescriptionStatus
W94.31XD Exposure to sudden change in air pressure in aircraft during descent, subsequent encounter Valid
W94.31XS Exposure to sudden change in air pressure in aircraft during descent, sequela Valid