X35.XXXA – Volcanic eruption, initial encounter
ICD-10-CM 2027 diagnosis code · Exposure to forces of nature
ICD-10-CM code
X35.XXXA
- Code
X35.XXXA(claims format:X35XXXA)- Description
- Volcanic eruption, initial encounter
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 20. External causes of morbidity (V00-Y99)
- Block
- X30-X39 Exposure to forces of nature
- Parent codes
- X35
7th character values
Codes in this category need a 7th character to describe the encounter or episode of care.
| Character | Meaning |
|---|---|
A | initial encounter |
D | subsequent encounter |
S | sequela |
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
X35 – Volcanic eruption
Excludes2 (not included here):
- tidal wave (tsunami) due to volcanic eruption (X37.41)
7th character note:
- The appropriate 7th character is to be added to code X35
Related codes in X35
Frequently asked questions
What is ICD-10 code X35.XXXA?
X35.XXXA is the ICD-10-CM code for volcanic eruption, initial encounter, in the block X30-X39 (Exposure to forces of nature).
Is X35.XXXA a billable code?
Yes. X35.XXXA is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does X35.XXXA belong to?
It belongs to category X35 – Volcanic eruption.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.