ICD-10-CM Book 2025 Edition

Chapters  /  Chapter 1

Chapter 1 Certain infectious and parasitic diseases (A00-B99)

Includes:
diseases generally recognized as communicable or transmissible
Use Additional
code to identify resistance to antimicrobial drugs (Z16.-)
Excludes1:
certain localized infections - see body system-related chapters
Excludes2:
carrier or suspected carrier of infectious disease (Z22.-)
infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
infectious and parasitic diseases specific to the perinatal period (P35-P39)
influenza and other acute respiratory infections (J00-J22)
A00-A09 Intestinal infectious diseases
A15-A19 Tuberculosis
A20-A28 Certain zoonotic bacterial diseases
A30-A49 Other bacterial diseases
A50-A64 Infections with a predominantly sexual mode of transmission
A65-A69 Other spirochetal diseases
A70-A74 Other diseases caused by chlamydiae
A75-A79 Rickettsioses
A80-A89 Viral and prion infections of the central nervous system
A90-A99 Arthropod-borne viral fevers and viral hemorrhagic fevers
B00-B09 Viral infections characterized by skin and mucous membrane lesions
B10 Other human herpesviruses
B15-B19 Viral hepatitis
B20 Human immunodeficiency virus [HIV] disease
B25-B34 Other viral diseases
B35-B49 Mycoses
B50-B64 Protozoal diseases
B65-B83 Helminthiases
B85-B89 Pediculosis, acariasis and other infestations
B90-B94 Sequelae of infectious and parasitic diseases
B95-B97 Bacterial and viral infectious agents
B99 Other infectious diseases