ICD-10-CM category
W94 Exposure to high and low air pressure and changes in air pressure
W94 is a category, not a billable code. Report one of the 30 complete codes below.
Codes in W94
- W94.0XXAExposure to prolonged high air pressure, initial encounter
- W94.0XXDExposure to prolonged high air pressure, subsequent encounter
- W94.0XXSExposure to prolonged high air pressure, sequela
- W94.11XAExposure to residence or prolonged visit at high altitude, initial encounter
- W94.11XDExposure to residence or prolonged visit at high altitude, subsequent encounter
- W94.11XSExposure to residence or prolonged visit at high altitude, sequela
- W94.12XAExposure to other prolonged low air pressure, initial encounter
- W94.12XDExposure to other prolonged low air pressure, subsequent encounter
- W94.12XSExposure to other prolonged low air pressure, sequela
- W94.21XAExposure to reduction in atmospheric pressure while surfacing from deep-water diving, initial encounter
- W94.21XDExposure to reduction in atmospheric pressure while surfacing from deep-water diving, subsequent encounter
- W94.21XSExposure to reduction in atmospheric pressure while surfacing from deep-water diving, sequela
- W94.22XAExposure to reduction in atmospheric pressure while surfacing from underground, initial encounter
- W94.22XDExposure to reduction in atmospheric pressure while surfacing from underground, subsequent encounter
- W94.22XSExposure to reduction in atmospheric pressure while surfacing from underground, sequela
- W94.23XAExposure to sudden change in air pressure in aircraft during ascent, initial encounter
- W94.23XDExposure to sudden change in air pressure in aircraft during ascent, subsequent encounter
- W94.23XSExposure to sudden change in air pressure in aircraft during ascent, sequela
- W94.29XAExposure to other rapid changes in air pressure during ascent, initial encounter
- W94.29XDExposure to other rapid changes in air pressure during ascent, subsequent encounter
- W94.29XSExposure to other rapid changes in air pressure during ascent, sequela
- W94.31XAExposure to sudden change in air pressure in aircraft during descent, initial encounter
- W94.31XDExposure to sudden change in air pressure in aircraft during descent, subsequent encounter
- W94.31XSExposure to sudden change in air pressure in aircraft during descent, sequela
- W94.32XAExposure to high air pressure from rapid descent in water, initial encounter
- W94.32XDExposure to high air pressure from rapid descent in water, subsequent encounter
- W94.32XSExposure to high air pressure from rapid descent in water, sequela
- W94.39XAExposure to other rapid changes in air pressure during descent, initial encounter
- W94.39XDExposure to other rapid changes in air pressure during descent, subsequent encounter
- W94.39XSExposure to other rapid changes in air pressure during descent, sequela
Outside the US? W94 in the international WHO ICD-10 lists its inclusion and exclusion notes.
Documenting W94? Write the note in seconds
Paste your rough notes and get a structured SOAP note. Free, no account needed.
ICD-10-CM is developed by the National Center for Health Statistics (NCHS), Centers for Disease Control and Prevention, U.S. Department of Health and Human Services, and is based on the WHO ICD-10. Codes and titles are reproduced unchanged from the FY2026 code list (effective 1 October 2025). Their use here does not imply endorsement by CDC, HHS or the U.S. Government. Changes effective on or after 1 October 2026 may not be reflected yet; check the current release at cdc.gov or cms.gov before submitting claims.
Look up another code
Stop looking codes up by hand
Docdemic listens to the consultation, writes the note and suggests the diagnosis and procedure codes that fit it, each one checked against your country’s official code list.
Try Docdemic free