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X31 - Exposure to excessive natural cold

ICD-10-CM Chapter 20: External causes of morbidity · X30-X39 Exposure to forces of nature (X30-X39) · Top-level category · FY2027

Coding Guidance

X31 requires a 7th character. Report the code below that matches the documentation, for example A for initial encounter, D for subsequent encounter, S for sequela.

Applicable To

Inclusion terms listed under X31 in the ICD-10-CM tabular list.

  • Excessive cold as the cause of chilblains NOS
  • Excessive cold as the cause of immersion foot or hand
  • Exposure to cold NOS
  • Exposure to weather conditions
7th Character

The appropriate 7th character is to be added to code X31

Includes, Excludes and Coding Notes

Excludes 1 — Not Coded HereFrom X31

Mutually exclusive: these conditions are never reported together with this code.

  • cold of man-made origin (W93.-)
  • contact with or inhalation of dry ice (W93.-)
  • contact with or inhalation of liquefied gas (W93.-)
NotesFrom Chapter V00-Y99

Instructional notes from the ICD-10-CM tabular list.

  • This chapter permits the classification of environmental events and circumstances as the cause of injury, and other adverse effects. Where a code from this section is applicable, it is intended that it shall be used secondary to a code from another chapter of the Classification indicating the nature of the condition. Most often, the condition will be classifiable to Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88). Other conditions that may be stated to be due to external causes are classified in Chapters I to XVIII. For these conditions, codes from Chapter 20 should be used to provide additional information as to the cause of the condition.

More Specific Codes (3)

X31.XXXAExposure to excessive natural cold, initial encounter→X31.XXXDExposure to excessive natural cold, subsequent encounter→X31.XXXSExposure to excessive natural cold, sequela→