2022 ICD-10-CM Diagnosis Code B08.21

Exanthema subitum [sixth disease] due to human herpesvirus 6

    2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code Pediatric Dx (0-17 years)
  • B08.21 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2022 edition of ICD-10-CM B08.21 became effective on October 1, 2021.
  • This is the American ICD-10-CM version of B08.21 - other international versions of ICD-10 B08.21 may differ.
ICD-10-CM Coding Rules
  • B08.21 is applicable to pediatric patients aged 0 - 17 years inclusive.
Applicable To
  • Roseola infantum due to human herpesvirus 6
The following code(s) above B08.21 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to B08.21:
  • A00-B99
    2022 ICD-10-CM Range A00-B99

    Certain infectious and parasitic diseases

    Includes
    • diseases generally recognized as communicable or transmissible
    Type 1 Excludes
    • certain localized infections - see body system-related chapters
    Type 2 Excludes
    • carrier or suspected carrier of infectious disease (Z22.-)
    • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
    • infectious and parasitic diseases specific to the perinatal period (P35-P39)
    • influenza and other acute respiratory infections (J00-J22)
    Use Additional
    • code to identify resistance to antimicrobial drugs (Z16.-)
    Certain infectious and parasitic diseases
  • B08
    ICD-10-CM Diagnosis Code B08

    Other viral infections characterized by skin and mucous membrane lesions, not elsewhere classified

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • vesicular stomatitis virus disease (A93.8)
    Other viral infections characterized by skin and mucous membrane lesions, not elsewhere classified
  • B08.2
    ICD-10-CM Diagnosis Code B08.2

    Exanthema subitum [sixth disease]

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    Applicable To
    • Roseola infantum
    Exanthema subitum [sixth disease]
Approximate Synonyms
  • Roseola infantum (hhv 6)
  • Roseola infantum due to human herpesvirus 6
ICD-10-CM B08.21 is grouped within Diagnostic Related Group(s) (MS-DRG v39.0):
  • 791 Prematurity with major problems
  • 793 Full term neonate with major problems
  • 865 Viral illness with mcc
  • 866 Viral illness without mcc

Convert B08.21 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change

Diagnosis Index entries containing back-references to B08.21:
  • Disease, diseased - see also Syndrome
    • sixth B08.20
      ICD-10-CM Diagnosis Code B08.20

      Exanthema subitum [sixth disease], unspecified

        2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code Pediatric Dx (0-17 years)
      Applicable To
      • Roseola infantum, unspecified
      • due to human herpesvirus 6 B08.21
  • Exanthem, exanthema - see also Rash
    • subitum B08.20
      ICD-10-CM Diagnosis Code B08.20

      Exanthema subitum [sixth disease], unspecified

        2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code Pediatric Dx (0-17 years)
      Applicable To
      • Roseola infantum, unspecified
      • due to human herpesvirus 6 B08.21
  • Roseola B09
    ICD-10-CM Diagnosis Code B09

    Unspecified viral infection characterized by skin and mucous membrane lesions

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    Applicable To
    • Viral enanthema NOS
    • Viral exanthema NOS
    • infantum B08.20
      ICD-10-CM Diagnosis Code B08.20

      Exanthema subitum [sixth disease], unspecified

        2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code Pediatric Dx (0-17 years)
      Applicable To
      • Roseola infantum, unspecified
      • due to human herpesvirus 6 B08.21
  • Sixth disease B08.20
    ICD-10-CM Diagnosis Code B08.20

    Exanthema subitum [sixth disease], unspecified

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code Pediatric Dx (0-17 years)
    Applicable To
    • Roseola infantum, unspecified
    • due to human herpesvirus 6 B08.21

ICD-10-CM Codes Adjacent To B08.21
B08.01 Cowpox and vaccinia not from vaccine
B08.010 Cowpox
B08.011 Vaccinia not from vaccine
B08.02 Orf virus disease
B08.03 Pseudocowpox [milker's node]
B08.04 Paravaccinia, unspecified
B08.09 Other orthopoxvirus infections
B08.1 Molluscum contagiosum
B08.2 Exanthema subitum [sixth disease]
B08.20 …… unspecified
B08.21 …… due to human herpesvirus 6
B08.22 …… due to human herpesvirus 7
B08.3 Erythema infectiosum [fifth disease]
B08.4 Enteroviral vesicular stomatitis with exanthem
B08.5 Enteroviral vesicular pharyngitis
B08.6 Parapoxvirus infections
B08.60 Parapoxvirus infection, unspecified
B08.61 Bovine stomatitis
B08.62 Sealpox
B08.69 Other parapoxvirus infections
B08.7 Yatapoxvirus infections

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.