Diagnostic Meta-Node
ICD-10 Chapter 1
Certain Infectious and Parasitic Diseases (A00-B99)
Canonical Range
A00-B99
ICD-10-CM Chapter 1 covers Certain Infectious and Parasitic Diseases (A00-B99) (A00-B99). Browse the official code blocks below to reach every diagnosis code in this chapter.
Official Chapter Notes & Instructions
CMS attaches these notes at the head of the A00-B99 chapter; they govern every code within it. Source: FY2027 ICD-10-CM tabular list (CMS/CDC).
Includes
- diseases generally recognized as communicable or transmissible
Use Additional Code
- code to identify resistance to antimicrobial drugs (Z16.-)
Type 2 Excludes (Excludes2)
- carrier or suspected carrier of infectious disease (Z22.-)
- certain localized infections - see body system-related chapters
- 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)
Code Blocks in A00-B99
- A00-A09Intestinal infectious diseases (A00-A09)
- A15-A19Tuberculosis (A15-A19)
- A20-A28Certain zoonotic bacterial diseases (A20-A28)
- A30-A49Other bacterial diseases (A30-A49)
- A50-A64Infections with a predominantly sexual mode of transmission (A50-A64)
- A65-A69Other spirochetal diseases (A65-A69)
- A70-A74Other diseases caused by chlamydiae (A70-A74)
- A75-A79Rickettsioses (A75-A79)
- A80-A89Viral and prion infections of the central nervous system (A80-A89)
- A90-A99Arthropod-borne viral fevers and viral hemorrhagic fevers (A90-A99)
- B00-B09Viral infections characterized by skin and mucous membrane lesions (B00-B09)
- B10Other human herpesviruses
- B15-B19Viral hepatitis (B15-B19)
- B20Human immunodeficiency virus [HIV] disease
- B25-B34Other viral diseases (B25-B34)
- B35-B49Mycoses (B35-B49)
- B50-B64Protozoal diseases (B50-B64)
- B65-B83Helminthiases (B65-B83)
- B85-B89Pediculosis, acariasis and other infestations (B85-B89)
- B90-B94Sequelae of infectious and parasitic diseases (B90-B94)
- B95-B97Bacterial and viral infectious agents (B95-B97)
- B99Other infectious diseases
Registry Metadata
RegionA00-B99
StatusACTIVE GUIDELINES