Paratyphoid fever A

This ICD-9-CM code represents an acute systemic infection caused by Salmonella enterica serovar Paratyphi A. It is characterized by fever, headache, malaise, and often a rash, clinically resembling typhoid fever but typically milder. The infection is acquired through ingestion of contaminated food or water.

Apply this code when documentation specifies a diagnosis of paratyphoid fever type A, confirmed by laboratory isolation of Salmonella Paratyphi A from blood, stool, or other bodily fluids, or based on strong clinical suspicion in an endemic area. Use for both initial and subsequent encounters related to the active infection.

• Distinguish carefully from typhoid fever (002.0) and other specified paratyphoid fevers (002.2, 002.3).
• Ensure documentation specifies "type A" to support this specific code.
• Do not use for carriers of Salmonella Paratyphi A without active disease; refer to codes for asymptomatic carriers.