2026 ICD-10-CM Diagnosis Code X38Flood

ICD-10-CM CodesV01–Y99X30-X39X38

ICD-10-CM X38
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

X38 is a non-billable ICD-10-CM category code for flood, so it cannot be submitted on claims. Use a more specific code from this category instead, such as X38.XXXA, X38.XXXD, and X38.XXXS.

Code Identity

ICD-10-CM Code
X38
Billable Status
No — Non-Billable Category
Code Describes
Flood
Chapter
X30-X39
Exposure to forces of nature

Code Classification

ChapterV01–Y99External causes of morbidity and mortality
SectionX30-X39Exposure to forces of nature
CategoryX38Flood
This CodeX38Flood

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Inclusion Terms

  • Flood arising from remote storm
  • Flood of cataclysmic nature arising from melting snow
  • Flood resulting directly from storm

Type 1 Excludes

  • collapse of dam or man-made structure causing earth movement X36.0
  • tidal wave NOS X37.41
  • tidal wave caused by storm X37.42

7th Character Note

  • The appropriate 7th character is to be added to code X38

7th Character

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Patient EducationClinical

Floods

Floods are common in the United States. Weather such as heavy rain, thunderstorms, hurricanes, or tsunamis can cause flooding. Flooding can also happen when a river or stream overflows its bank, when a levee is breached, or when a dam breaks. Flash floods, which can develop quickly, often have a dangerous wall of roaring water.

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Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About X38Overview

Is X38 (Flood) a billable code?

No. This is a category header that groups the codes for flood, and headers cannot be submitted on claims. Claims for flood need a more specific code from this category, such as X38.XXXA, X38.XXXD, and X38.XXXS.