1. Home
  2. ICD-10-CM Codes List
  3. A00–B99
  4. B25-B34
  5. Viral infection of unspecified site (B34)

Viral infection of unspecified site (B34)

The ICD-10 code B34 covers "viral infection of unspecified site," providing a classification for viral infections where a specific location in the body is not identified. Subcategories include codes for different virus types like adenovirus (B34.0), enterovirus (B34.1), coronavirus (B34.2), parvovirus (B34.3), papovavirus (B34.4), other unspecified viral infections (B34.8), and a general unspecified viral infection code (B34.9).

These codes help medical coders and healthcare providers accurately record viral infections that do not involve a clearly defined site, or when the viral agent is identified but the exact infected location is unknown. For instance, B34.0 is used for adenovirus infections, which may also be referred to as "Simian adenovirus infection" or "adenovirus infection in immunocompromised person." Similarly, B34.1 includes enterovirus infections, covering conditions like Coxsackie virus disease and echovirus infection. The broad category B34.9 includes symptoms or syndromes like viral fever, viral arthritis, or viral labyrinthitis when the infection site is unspecified. Understanding these specifications assists in choosing the correct code for documentation, treatment, and epidemiological tracking of viral diseases where infection sites are not clearly pinpointed.

Instructional Notations

Type 1 Excludes

A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

  • anogenital human papillomavirus infection A63.0
  • cytomegaloviral disease NOS B25.9
  • herpesvirus [herpes simplex] infection NOS B00.9
  • retrovirus infection NOS B33.3
  • viral agents as the cause of diseases classified elsewhere B97
  • viral warts due to human papillomavirus infection B07

Clinical Terms

The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.

Viremia

The presence of viruses in the blood.