MCMedicalCodingSoftware
B08.21

B08.21: Exanthema subitum [sixth disease] due to human herpesvirus 6

Billable / specific codeICD-10-CM

B08.21 is a billable, specific ICD-10-CM code for exanthema subitum [sixth disease] due to human herpesvirus 6. It is valid for submission on a claim.

Check B08.21 with the rest of the claim: free scrubber

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Roseola infantum due to human herpesvirus 6

Excludes1 inherited from the categories above B08.21

A category’s note binds every code beneath it.

Written on B08: Other viral infections characterized by skin and mucous membrane lesions, not elsewhere classified

  • vesicular stomatitis virus disease (A93.8)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Alphabetic index entries that lead here

  • Sixth disease›due to human herpesvirus 6
  • Disease, diseased›sixth›due to human herpesvirus 6
  • Exanthem, exanthema›subitum›due to human herpesvirus 6
  • Roseola›infantum›due to human herpesvirus 6

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under B08.2

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.