ICD-10 Code A03.2 – Shigellosis due to Shigella boydii (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A03.2 – Shigellosis due to Shigella boydii
What it is
A03.2 identifies shigellosis caused by Shigella boydii, a bacterial intestinal infection. Use it when documentation names this specific organism as the cause of the patient’s shigellosis.
Clinical signs
Typical findings include diarrhea, abdominal cramps, fever, and sometimes blood or mucus in stool. Clinical features vary; refer to documentation for confirmed organism and presentation.
When to use this code
Use A03.2 when the provider documents shigellosis due to Shigella boydii, or when culture or other definitive testing identifies this species. It also fits confirmed infectious colitis linked to this organism. If the record only says “shigellosis” without the species, check documentation before assigning this code.
Do not use for
Do not use this code for shigellosis caused by another Shigella species, unspecified shigellosis, or noninfectious diarrhea. Check documentation if the organism is not clearly identified.
Coding tip
Code A03.2 only when Shigella boydii is specifically documented or confirmed; otherwise, use the most accurate unspecified or other shigellosis code supported by the record.