ICD-10 Code A02.9 – Salmonella infection, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A02.9 – Salmonella infection, unspecified
What it is
A02.9 identifies a Salmonella infection when the record confirms Salmonella but does not specify the site, type, or complication. Use it for an unspecified salmonellosis diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Salmonella infection commonly presents with acute gastrointestinal illness such as diarrhea, abdominal cramping, fever, nausea, or vomiting.
When to use this code
Use A02.9 when the clinician documents Salmonella infection without further detail. It is appropriate when the note does not identify enteritis, sepsis, or another specific Salmonella manifestation. If the record is more specific, code that condition instead.
Do not use for
Do not use this code for confirmed Salmonella sepsis, localized Salmonella infection, or a more specific salmonellosis diagnosis. Check documentation if the organism, site, or complication is named.
Coding tip
Code the highest level of specificity documented; if Salmonella is mentioned only generally, A02.9 is the correct fallback.