ICD-10-CM 2027 diagnosis code
X38Flood
X38 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.
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 X38
X38 is the ICD-10-CM diagnosis code for Flood. It belongs to block X30-X39 (exposure to forces of nature) and chapter 20 (external causes of morbidity). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.
To report this condition, pick the subcode that matches the documentation: X38.XXXA (initial encounter), X38.XXXD (subsequent encounter) and X38.XXXS (sequela).
Don't report X38 together with the conditions in its Excludes1 note: collapse of dam or man-made structure causing earth movement (X36.0), tidal wave NOS (X37.41) and tidal wave caused by storm (X37.42).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under X38
Coding notes
- Flood arising from remote storm
- Flood of cataclysmic nature arising from melting snow
- Flood resulting directly from storm
Notes that apply from higher levels
Instructions written at a parent level also apply to X38.
Broader instructions also apply from Chapter 20: External causes of morbidity.
Alphabetic index entries
3 entriesTerms in the official ICD-10-CM index that lead to X38.
Codes whose notes reference X38
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 X38
Is X38 billable?
- No. X38 is a header code. Report one of its more specific subcodes instead.