Block in Chapter 1
A80–A89
Viral and prion infections of the central nervous system
Use additional code
Add the listed code as a secondary code, if known.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (5 notes)
Inherited from Chapter 1 Certain infectious and parasitic diseases
- 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)
Includes
Further defines or gives examples of the content of the category.
Also from chapter/block level (1 note)
Inherited from Chapter 1 Certain infectious and parasitic diseases
- diseases generally recognized as communicable or transmissible
Categories in this block 10
- A80Acute poliomyelitis
- A81Atypical virus infections of central nervous system
- A82Rabies
- A83Mosquito-borne viral encephalitis
- A84Tick-borne viral encephalitis
- A85Other viral encephalitis, not elsewhere classified
- A86Unspecified viral encephalitisBillable
- A87Viral meningitis
- A88Other viral infections of central nervous system, not elsewhere classified
- A89Unspecified viral infection of central nervous systemBillable