ICD-10 Code A03.0 – Shigellosis due to Shigella dysenteriae (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A03.0 – Shigellosis due to Shigella dysenteriae
What it is
A03.0 identifies shigellosis caused by Shigella dysenteriae. Use it when documentation names this organism as the cause of the intestinal infection.
Clinical signs
Typical findings include acute diarrhea, abdominal cramps, fever, and sometimes bloody or mucoid stools. Clinical features vary; refer to documentation.
When to use this code
Use A03.0 when the provider documents shigellosis due to Shigella dysenteriae, or when the organism is confirmed in the record. It applies to the specific infectious diagnosis, not to nonspecific gastroenteritis without identified Shigella. If the species is not stated, check documentation before coding.
Do not use for
Do not use this code for shigellosis caused by another Shigella species or for unspecified shigellosis. Check documentation if the chart only says diarrhea, dysentery, or bacterial enteritis.
Coding tip
Code the organism exactly as documented, and verify species-level wording before selecting A03.0.