ICD-10 Code A03.8 – Other shigellosis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A03.8 – Other shigellosis
What it is
A03.8 identifies shigellosis caused by Shigella infection that does not fit the more specific ICD-10 categories. Use it for documented “other” Shigella species or presentations when the record supports shigellosis.
Clinical signs
Typical findings include acute infectious diarrhea, abdominal cramps, fever, and sometimes blood or mucus in stool. Clinical features vary; refer to documentation when the organism is noted only as Shigella or another specified type.
When to use this code
Use this code when the clinician documents shigellosis and the case is not classified elsewhere in A03. It may apply when the species is recorded as “other” or when the chart clearly indicates Shigella infection but not a more specific subtype. Check documentation if the organism is unspecified.
Do not use for
Do not use A03.8 for amoebic dysentery, noninfectious diarrhea, or shigellosis with a different specific ICD-10 category. If the record does not confirm shigellosis, check documentation.
Coding tip
Code the documented Shigella condition as specifically as possible, and confirm whether another A03 code is a better match before selecting A03.8.