A08.1
⚠ Non-billable
Acute gastroenteropathy due to Norwalk agent and other small round viruses
ICD-10-CM · FY2026 · Certain Infectious and Parasitic Diseases
Code
A08.1
System
ICD-10-CM
Billable
No — use specific code
Effective
FY2026
Chapter
Certain Infectious and Parasitic Diseases
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code A08.1?
ICD-10-CM code A08.1 represents Acute gastroenteropathy due to Norwalk agent and other small round viruses. It is a non-billable header code requiring a more specific subcategory in the Certain Infectious and Parasitic Diseases chapter, effective October 1, 2025 – September 30, 2026.
Is A08.1 billable?
No. A08.1 is a non-billable header. Select a more specific subcategory for claims submission.
What chapter is A08.1 in?
A08.1 belongs to the Certain Infectious and Parasitic Diseases chapter (A00–B99) of ICD-10-CM.
Related codes in the A08 category
A08
Viral and other specified intestinal infections
Non-billable
A08.0
Rotaviral enteritis
Billable
A08.2
Adenoviral enteritis
Billable
A08.3
Other viral enteritis
Non-billable
A08.4
Viral intestinal infection, unspecified
Billable
A08.8
Other specified intestinal infections
Billable
A08.11
Acute gastroenteropathy due to Norwalk agent
Billable
A08.19
Acute gastroenteropathy due to other small round viruses
Billable
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