ICD-10-CM 2027
ICD-10 code for reduced temperature effect
From the official ICD-10-CM alphabetic index entry “Effect, adverse › reduced temperature”. Page updated September 29, 2026.
About coding reduced temperature effect
The ICD-10-CM code for reduced temperature effect is T69.9 (Effect of reduced temperature, unspecified). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on T69.9.
Within T69, choose T69.9 (Effect of reduced temperature, unspecified) only when documentation doesn't support a more specific option: Immersion hand and foot (T69.0), Chilblains (T69.1) and other specified effects of reduced temperature (T69.8).
Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.
Use an additional code to identify source of exposure: Exposure to excessive cold of man-made origin (W93) and Exposure to excessive cold of natural origin (X31).
More specific reduced temperature effect codes (official index)
- immersion foot or hand
- specified effect NEC T69.8 — Other specified effects of reduced temperature
Common questions about reduced temperature effect ICD-10 codes
What is the ICD-10 code for reduced temperature effect?
- T69.9 — Effect of reduced temperature, unspecified (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: T69.8.
Is T69.9 billable?
- No. T69.9 is a header code. Report one of its more specific subcodes instead.