ICD-10 Code A01.2 – Paratyphoid fever B (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A01.2 – Paratyphoid fever B
What it is
Paratyphoid fever B is a bacterial enteric infection caused by Salmonella Paratyphi B. It is a systemic febrile illness that can resemble typhoid fever and is documented as a specific infectious diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Commonly reported findings include fever, headache, abdominal discomfort, and gastrointestinal symptoms. Diagnosis is based on the clinician’s confirmation of paratyphoid fever B.
When to use this code
Use A01.2 when the provider documents paratyphoid fever B, paratyphoid infection due to Salmonella Paratyphi B, or an equivalent confirmed diagnosis. Code it for active illness, not for simple exposure or carrier status. Check documentation if the organism is not clearly specified.
Do not use for
Do not use this code for typhoid fever, other paratyphoid types, or nonspecific Salmonella gastroenteritis. If the record only says “Salmonella infection” without type, check documentation.
Coding tip
Confirm the provider names the infection as paratyphoid fever B before assigning A01.2.