X31 — Exposure to excessive natural cold
Part of Chapter 20: External causes of morbidity , block Exposure to forces of nature (X30-X39) .
Official Notes
Inclusion Terms
Excessive cold as the cause of chilblains NOS
Inclusion Terms
Excessive cold as the cause of immersion foot or hand
Inclusion Terms
Exposure to cold NOS
Inclusion Terms
Exposure to weather conditions
Excludes1
cold of man-made origin ( W93 .-)
Excludes1
contact with or inhalation of dry ice ( W93 .-)
Excludes1
contact with or inhalation of liquefied gas ( W93 .-)
7th Character
The appropriate 7th character is to be added to code X31
7th Character
A - initial encounter
7th Character
D - subsequent encounter
7th Character
S - sequela
Child Codes
Referenced By
Official notes on these codes cite X31.
FY 2027 effective October 1, 2026 · CDC NCHS and CMS