W94.1 Exposure to prolonged low air pressure

Non-billable header with 2 child codes.

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

7th character note

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

7th character required

• A — initial encounter
• D — subsequent encounter
• S — sequela

Codes under W94.1

• W94.11 Exposure to residence or prolonged visit at high altitude
• W94.12 Exposure to other prolonged low air pressure

Code annotations containing back-references to W94.1

Back-references to W94

• Type 1 Excludes: V97.8 Other air transport accidents, not elsewhere classified ("exposure to changes in air pressure during ascent or descent (W94.-)")
• Type 1 Excludes: W16 Fall, jump or diving into water ("effects of air pressure from diving (W94.-)")

Nearby codes

• W94 Exposure to high and low air pressure and changes in air pressure
• W94.0 Exposure to prolonged high air pressure
• W94.0XXA Exposure to prolonged high air pressure, initial encounter
• W94.0XXD Exposure to prolonged high air pressure, subsequent encounter
• W94.0XXS Exposure to prolonged high air pressure, sequela
• W94.1 Exposure to prolonged low air pressure (this code)
• W94.11 Exposure to residence or prolonged visit at high altitude
• W94.11XA Exposure to residence or prolonged visit at high altitude, initial encounter
• W94.11XD Exposure to residence or prolonged visit at high altitude, subsequent encounter
• W94.11XS Exposure to residence or prolonged visit at high altitude, sequela
• W94.12 Exposure to other prolonged low air pressure