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ICD-10-CM 2027 diagnosis code

T69.1Chilblains

Not billable — use a more specific codeRequires 7th character

T69.1 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 Pernio, ICD-10 code for Chilblain.

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 T69.1

T69.1 is the ICD-10-CM diagnosis code for Chilblains. 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 (other effects of reduced temperature), T69.1 is specifically for Chilblains. Related codes cover Immersion hand and foot (T69.0), other specified effects of reduced temperature (T69.8) and effect of reduced temperature, unspecified (T69.9).

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 T69.1.

› From T69 Other effects of reduced temperature
Excludes2
Use additional code
  • code to identify source of exposure:
  • Exposure to excessive cold of man-made origin (W93)
  • Exposure to excessive cold of natural origin (X31)

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

5 entries

Terms in the official ICD-10-CM index that lead to T69.1.

Codes whose notes reference T69.1

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about T69.1

Is T69.1 billable?

No. T69.1 is a header code. Report one of its more specific subcodes instead.