ICD-10-CM 2027 diagnosis code
T69.9Effect of reduced temperature, unspecified
T69.9 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it and add the required 7th character.
Looking up by condition? See ICD-10 code for Frozen, ICD-10 code for Freezing, ICD-10 code for Congelation, ICD-10 code for Cold effect.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About T69.9
T69.9 is the ICD-10-CM diagnosis code for effect of reduced temperature, unspecified. It belongs to category T69 (other effects of reduced temperature), block T66-T78 (other and unspecified effects of external causes) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.
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).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
7th character
The appropriate 7th character is to be added to each code from category T69
Notes that apply from higher levels
Instructions written at a parent level also apply to T69.9.
Broader instructions also apply from T66-T78 Other and unspecified effects of external causes and Chapter 19: Injury, poisoning and certain other consequences of external causes.
Alphabetic index entries
12 entriesTerms in the official ICD-10-CM index that lead to T69.9.
- Cold › effects of
- Cold › excessive, effects of
- Cold › exposure to
- Congelation
- Effect, adverse › cold (temperature) (weather)
- Effect, adverse › reduced temperature
- Excess, excessive, excessively › cold, effects of
- Exposure (to) › cold, effects of
- Freezing
- Frozen
- Temperature › cold, trauma from
- Weather, weathered › effects of › cold
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about T69.9
Is T69.9 billable?
- No. T69.9 is a header code. Report one of its more specific subcodes instead.