W94.31XS — Exposure to sudden change in air pressure in aircraft during descent, sequela

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Code Set: Valid FY2026 and FY2027. FY2026 took effect October 1, 2025.

Official Registry Overview & Definition

Exposure to sudden change in air pressure in aircraft during descent, sequela is a billable ICD-10-CM diagnosis code (W94.31S).

Sequencing, inclusion, and exclusion notes published for W94.31XS in the official ICD-10-CM tabular list.

Conditions that can never be reported with this code; the two are mutually exclusive.

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)

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

Official ICD-10-CM classifications closest to W94.31XS in its code family, with their registry titles.

W94.29XS — Exposure to other rapid changes in air pressure during ascent, sequela
W94.3 — Exposure to rapid changes in air pressure during descent
W94.31 — Exposure to sudden change in air pressure in aircraft during descent
W94.31XA — Exposure to sudden change in air pressure in aircraft during descent, initial encounter
W94.31XD — Exposure to sudden change in air pressure in aircraft during descent, subsequent encounter
W94.32 — Exposure to high air pressure from rapid descent in water
W94.32XA — Exposure to high air pressure from rapid descent in water, initial encounter
W94.32XD — Exposure to high air pressure from rapid descent in water, subsequent encounter
W94.32XS — Exposure to high air pressure from rapid descent in water, sequela
W94.39 — Exposure to other rapid changes in air pressure during descent