ICD-10 Code A32 – Listeriosis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A32 – Listeriosis
What it is
A32 identifies listeriosis, an infection caused by Listeria species. It is used when the diagnosis is confirmed or documented as listerial infection, including invasive disease.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include fever, gastrointestinal symptoms, sepsis, meningitis, or pregnancy-related infection, depending on the site and severity.
When to use this code
Use A32 when the provider documents listeriosis or listerial infection as the active diagnosis. It may apply to bloodstream, central nervous system, or maternal-fetal involvement when clearly stated. Code the documented manifestation if the record specifies a more detailed site or complication.
Do not use for
Do not use A32 for suspected exposure, carrier status, or nonspecific foodborne illness without documented listeriosis. Check documentation if the organism is not identified or if another infection is confirmed.
Coding tip
Code the infection only when listeriosis is explicitly documented, and capture associated manifestations separately if the record supports them.