ICD10BillableValid for clinical use

ICD-10 Code B08.20: Exanthema subitum [sixth disease], unspecified

B08.20 is a billable ICD-10 diagnosis code used to classify Exanthema subitum [sixth disease], unspecified in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Certain infectious and parasitic diseases (A00-B99).

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Certain infectious and parasitic diseases (A00-B99).

When is it used?

  • May be used when a clinician documents exanthema subitum [sixth disease], unspecified in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
1Certain infectious and parasitic diseases (A00-B99)
block
B00-B09Viral infections characterized by skin and mucous membrane lesions
category
B08Other viral infections characterized by skin and mucous membrane lesions, not elsewhere classified
category
B08.2Exanthema subitum [sixth disease]
currentB08.2

Official coding notes

Inclusion terms
  • Roseola infantum, unspecified

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

Infectious Disease SpecialistGeneral Physician

Coding guidelines

Common synonyms

Exanthema subitum [sixth disease], unspecifiedExanthema subitum [sixth disease]

Frequently asked questions

Code details

CodeB08.20
SystemICD10
Display nameExanthema subitum [sixth disease], unspecified
ChapterCertain infectious and parasitic diseases (A00-B99)
BlockViral infections characterized by skin and mucous membrane lesions

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
Disease, diseasedExanthem, exanthemaPseudorubellaRoseolaSixth disease

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

ICD-10 Code B08.20 for Exanthema subitum [sixth disease], unspecified | HealthAssure