Chapter 1
A00–B99: Certain Infectious and Parasitic Diseases
Certain Infectious and Parasitic Diseases diagnostic classification updated for 2026.
Chapter Instructions
Includes
- diseases generally recognized as communicable or transmissible
Excludes1(Not coded here. Use a different code.)
- certain localized infections - see body system-related chapters
Excludes2(Not included here. Code separately if applicable.)
Use Additional Code