X31

Billable

Exposure to excessive natural cold

X31 is the ICD-10-CM code for Exposure to excessive natural cold. It is a billable, specific code valid for reimbursement.

Status
Billable
Chapter
V00-Y99
Edition
FY2026

V00-Y99 External causes of morbidity

What this means — in plain language

MedlinePlus · NIH

Cold weather can affect your body in different ways. You can get frostbite , which is an injury to the body that is caused by freezing. Your body can also lose heat faster than you can produce it. That can cause hypothermia, or abnormally low body temperature. It can make you sleepy, confused, and clumsy. Because it happens gradually and affects your thinking, you may not realize you need help. That makes it…

Read more about Hypothermia at MedlinePlus ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

Includes

  • 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

Excludes1 — not coded here

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

Frequently asked questions

What is ICD-10 code X31?
X31 is the ICD-10-CM code for "Exposure to excessive natural cold". It falls under V00-Y99 External causes of morbidity.
Is X31 a billable code?
Yes — X31 is a billable, specific ICD-10-CM code valid for reimbursement.
What is excluded from X31?
Excludes1 (not coded here): cold of man-made origin (W93.-); contact with or inhalation of dry ice (W93.-); contact with or inhalation of liquefied gas (W93.-).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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