A08.11 – Acute gastroenteropathy due to Norwalk agent

ICD-10-CM 2027 diagnosis code · Intestinal infectious diseases

Billable code

ICD-10-CM code A08.11

Code: A08.11 (claims format: A0811)
Description: Acute gastroenteropathy due to Norwalk agent
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 1. Certain infectious and parasitic diseases (A00-B99)
Block: A00-A09 Intestinal infectious diseases
Parent codes: A08 › A08.1

Notes for A08.11

Applicable to:

Acute gastroenteropathy due to Norovirus
Acute gastroenteropathy due to Norwalk-like agent

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

A08 – Viral and other specified intestinal infections

Excludes1 (not coded here):

influenza with involvement of gastrointestinal tract (J09.X3, J10.2, J11.2)

Index terms for A08.11

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in A08.1

A08.19 – Acute gastroenteropathy due to other small round virusesBillable

Frequently asked questions

What is ICD-10 code A08.11?

A08.11 is the ICD-10-CM code for acute gastroenteropathy due to Norwalk agent, in the block A00-A09 (Intestinal infectious diseases).

Is A08.11 a billable code?

Yes. A08.11 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does A08.11 belong to?

It belongs to category A08 – Viral and other specified intestinal infections.

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.