ICD-10 Code for Virus

The ICD-10-CM 2027 alphabetic index lists virus, viral with the subterms below. More specific codes depend on the details documented, as listed in the official index (14 codes, 13 billable).

Index entries for Virus

as cause of disease classified elsewhere – B97.89
- respiratory syncytial virus (RSV) – see Virus, respiratory syncytial (RSV)
cytomegalovirus – B25.9
human immunodeficiency (HIV) – see Human, immunodeficiency virus (HIV) disease
infection – see Infection, virus
respiratory syncytial (RSV)
- as cause of disease classified elsewhere – B97.4
- bronchiolitis – J21.0
- bronchitis – J20.5
- bronchopneumonia – J12.1
- otitis media – H65.- (header) – B97.4 [manifestation]
- pneumonia – J12.1
- upper respiratory infection – J06.9 – B97.4 [manifestation]
specified NEC – B34.8
swine influenza (viruses that normally cause infections in pigs) – J09.X2 – see also Influenza, due to, identified novel influenza A virus
West Nile (fever) – A92.30
- with
  - complications NEC – A92.39
  - cranial nerve disorders – A92.32
  - encephalitis – A92.31
  - encephalomyelitis – A92.31
  - neurologic manifestation NEC – A92.32
  - optic neuritis – A92.32
  - polyradiculitis – A92.32

How to choose the right code

Start with the main term, then pick the indented subterm that matches the documentation (type, cause, site, laterality, episode of care). Always confirm the code in the tabular list: follow its Excludes1/Excludes2, “code first” and “use additional code” notes, and add a 7th character where required.

Source: CDC/NCHS ICD-10-CM FY2027 alphabetic index.