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
Short Description
Flood
Same as the full description in the CMS dataset.
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

External Cause of Injuries IndexGuidance

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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Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

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

What is the ICD-10 code for flood?

X38 is the ICD-10-CM category for flood, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.