Cholera due to Vibrio cholerae 01, biovar cholerae

This code identifies cholera specifically caused by the O1 serogroup of Vibrio cholerae, and further specifies the biovar cholerae. This is an acute diarrheal illness characterized by severe watery diarrhea, vomiting, and rapid dehydration. It represents a severe, often life-threatening, form of cholera.

Assign this code when documentation confirms a diagnosis of cholera and laboratory testing specifically identifies Vibrio cholerae O1, biovar cholerae, as the causative agent. This typically occurs in endemic areas or during outbreaks where specific strain identification is performed. Supporting documentation includes microbiology reports and physician notes detailing the specific pathogen.

• Ensure laboratory confirmation specifies Vibrio cholerae O1, biovar cholerae; do not use for unspecified Vibrio cholerae or other serogroups.
• Distinguish from A00.1 (cholera due to Vibrio cholerae O1, biovar eltor) and A00.9 (cholera, unspecified).
• Code any associated dehydration or other complications separately.