Block · Chapter 1
A80-A89 Viral and prion infections of the central nervous system (A80-A89)
Block A80-A89 groups 10 categories with 48 billable codes in FY2027.
Where it sits
- Chapter 1 Certain infectious and parasitic diseases (A00-B99)
- A80-A89 Viral and prion infections of the central nervous system (A80-A89)
Neighbouring blocks
- Categories
- 10
- Billable codes
- 48
- CC codes
- 25
- MCC codes
- 20
- HCC V28 codes
- 10
- New FY2027
- 0
Categories in A80-A89
- A80
- A81
- A82
- A83
- A84
- A85
Other viral encephalitis, not elsewhere classified
Cruchet's disease → A85.8
- 4 billable codes
- 3 CC
- 1 MCC
- A86
- A87
- A88
Other viral infections of central nervous system, not elsewhere classified
Boston exanthem → A88.0
- 3 billable codes
- 2 CC
- A89
Unspecified viral infection of central nervous system
Infection, infected, infective (opportunistic)›virus, viral NOS›central nervous system → A89
- Billable, no subdivisions
- 1 CC
Index main terms
- Encephalitis (chronic) (hemorrhagic) (idiopathic) (nonepidemic) (spurious) (subacute) → A80, A81, A83, A84, A85, A86, A87 (67 entries)
- Infection, infected, infective (opportunistic) → A81, A83, A84, A87, A88, A89 (16 entries)
- Meningitis (basal) (basic) (brain) (cerebral) (cervical) (congestive) (diffuse) (hemorrhagic) (infantile) (membranous) (metastatic) (nonspecific) (pontine) (progressive) (simple) (spinal) (subacute) (sympathetic) (toxic) → A80, A87 (12 entries)
- Disease, diseased → A81, A83, A84, A88 (10 entries)
- Poliomyelitis (acute) (anterior) (epidemic) → A80 (10 entries)
- Creutzfeldt-Jakob disease or syndrome (with dementia) → A81 (6 entries)
- Meningoencephalitis → A83, A84, A86, A87 (6 entries)
- Encephalomyelitis → A83 (3 entries)
- Leukoencephalopathy → A81 (3 entries)
- Lymphocytic → A87 (3 entries)
- Rabies → A82 (3 entries)
- Coxsackie (virus) (infection) → A87, A88 (2 entries)
- Exanthem, exanthema → A88 (2 entries)
- Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) → A80, A88 (2 entries)
- Leukoencephalitis → A81 (2 entries)
+30 more main terms; the search box finds them by word.
Block instructions
Notes that also apply
Chapter 1 instructions (Includes 1, Excludes2 5, Use additional code 1): printed on the chapter 1 page.