W94.21 Exposure to reduction in atmospheric pressure while surfacing from deep-water diving

Non-billable ICD-10-CM code.

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

Code annotations containing back-references to W94.21

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.-)")

Diagnosis Index entries for W94.21

• Air › pressure › change, rapid › during › ascent › while (in) (surfacing from) › deep water diving

Nearby codes

• W94.12 Exposure to other prolonged low air pressure
• W94.12XA Exposure to other prolonged low air pressure, initial encounter
• W94.12XD Exposure to other prolonged low air pressure, subsequent encounter
• W94.12XS Exposure to other prolonged low air pressure, 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 (this code)
• W94.21XA Exposure to reduction in atmospheric pressure while surfacing from deep-water diving, initial encounter
• W94.21XD Exposure to reduction in atmospheric pressure while surfacing from deep-water diving, subsequent encounter
• W94.21XS Exposure to reduction in atmospheric pressure while surfacing from deep-water diving, sequela
• W94.22 Exposure to reduction in atmospheric pressure while surfacing from underground
• W94.22XA Exposure to reduction in atmospheric pressure while surfacing from underground, initial encounter