W94.23XS ICD-10 Code: Exposure to sudden change in air pressure in aircraft during ascent, 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 ascent, sequela is a billable ICD-10-CM diagnosis code (W94.23S).

Sequencing, inclusion, and exclusion notes published for W94.23XS 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 W94.23XS in its code family, with their registry titles.

W94.22XD — Exposure to reduction in atmospheric pressure while surfacing from underground, subsequent encounter
W94.22XS — Exposure to reduction in atmospheric pressure while surfacing from underground, sequela
W94.23 — Exposure to sudden change in air pressure in aircraft during ascent
W94.23XA — Exposure to sudden change in air pressure in aircraft during ascent, initial encounter
W94.23XD — Exposure to sudden change in air pressure in aircraft during ascent, subsequent encounter
W94.29 — Exposure to other rapid changes in air pressure during ascent
W94.29XA — Exposure to other rapid changes in air pressure during ascent, initial encounter
W94.29XD — Exposure to other rapid changes in air pressure during ascent, subsequent encounter
W94.29XS — Exposure to other rapid changes in air pressure during ascent, sequela
W94.3 — Exposure to rapid changes in air pressure during descent