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ICD-10-CM 2027

ICD-10 code for temperature accidental subnormal

T68

Hypothermia

Header — needs a more specific code

From the official ICD-10-CM alphabetic index entry “Subnormal, subnormality › temperature (accidental)”. Page updated September 29, 2026.

About coding temperature accidental subnormal

The ICD-10-CM code for temperature accidental subnormal is T68 (Hypothermia).

To report this condition, pick the subcode that matches the documentation: T68.XXXA (initial encounter), T68.XXXD (subsequent encounter) and T68.XXXS (sequela).

Don't report T68 together with the conditions in its Excludes1 note: hypothermia following anesthesia (T88.51), hypothermia not associated with low environmental temperature (R68.0) and hypothermia of newborn (P80.-).

The conditions in its Excludes2 note aren't part of T68, but may be coded alongside it if the patient has both: frostbite (T33-T34).

Don't confuse with (Excludes1 for T68)

  • hypothermia following anesthesia (T88.51)
  • hypothermia not associated with low environmental temperature (R68.0)
  • hypothermia of newborn (P80.-)

Common questions about temperature accidental subnormal ICD-10 codes

What is the ICD-10 code for temperature accidental subnormal?

T68 — Hypothermia (a header code; report a more specific subcode).

Is T68 billable?

No. T68 is a header code. Report one of its more specific subcodes instead.