Paratyphoid fever B

This code identifies an acute systemic infection caused by Salmonella Paratyphi B, characterized by fever, headache, malaise, and often gastrointestinal symptoms like diarrhea or constipation. It is a less severe form of enteric fever compared to typhoid but can still lead to complications if untreated.

Assign this code when documentation clearly specifies a diagnosis of paratyphoid fever type B, confirmed by laboratory findings (e.g., positive blood or stool cultures for Salmonella Paratyphi B) or strong clinical suspicion in an endemic area. This code is appropriate for both initial and subsequent encounters related to this specific infection.

• Differentiate carefully from paratyphoid A (A01.1) and C (A01.3); the specific serotype must be documented.
• Do not use for unspecified paratyphoid fever (A01.4) if the serotype B is known.
• Code any associated complications, such as intestinal perforation or hemorrhage, in addition to the primary infection code.