ICD-10-CM · Chapter 1 · A00–B99
A08.1
Acute gastroenteropathy due to Norwalk agent and other small round viruses
Certain infectious and parasitic diseases
Heads up:this is a parent code. It's typically not directly billable — you need to drill down to a more specific child code (one with additional digits) to use on a claim.
Quick facts
- Code
- A08.1
- Type
- Category / header (non-billable)
- ICD-10-CM chapter
- Chapter 1 — Certain infectious and parasitic diseases
- Category
- A08 — Viral and other specified intestinal infections
- Specificity
- 4 characters
How coders use this code
ICD-10-CM A08.1 is a category (header) for acute gastroenteropathy due to norwalk agent and other small round viruses. It is generally not reported directly on a claim — coders drill down to a more specific child code (one with additional characters) that matches the documentation. Use the related codes below to find the billable code that fits, and verify against the annual NCHS/CMS guidelines.
Related codes in A08
- A08Viral and other specified intestinal infections
- A08.0Rotaviral enteritis
- A08.11Acute gastroenteropathy due to Norwalk agent
- A08.19Acute gastroenteropathy due to other small round viruses
- A08.2Adenoviral enteritis
- A08.3Other viral enteritis
- A08.31Calicivirus enteritis
- A08.32Astrovirus enteritis
- A08.39Other viral enteritis
- A08.4Viral intestinal infection, unspecified
- A08.8Other specified intestinal infections
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