2026 ICD-10-CM Diagnosis Code X35Volcanic eruption
X35 is a non-billable ICD-10-CM category code for volcanic eruption, so it cannot be submitted on claims. Use a more specific code from this category instead, such as X35.XXXA, X35.XXXD, and X35.XXXS.
Code Identity
Code Classification
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Type 2 Excludes
- tidal wave tsunami due to volcanic eruption X37.41
7th Character Note
- The appropriate 7th character is to be added to code X35
7th Character
- A - initial encounter
- D - subsequent encounter
- S - sequela
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
Indicates that a seventh character is to be assigned to codes in a subcategory.
Patient EducationClinical
Volcanoes
A volcano is a vent in the Earth's crust. Hot rock, steam, poisonous gases, and ash reach the Earth's surface when a volcano erupts. An eruption can also cause earthquakes, mudflows and flash floods, rock falls and landslides, acid rain, fires, and even tsunamis.
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