ICD-10-CM Codes
A00-B99 Certain infectious and parasitic diseases
B00-B09 Viral infections characterized by skin and mucous membrane lesions
B08- Other viral infections characterized by skin and mucous membrane lesions, not elsewhere classified
2023 ICD-10-CM Diagnosis Code B08.21

2023 ICD-10-CM Diagnosis Code B08.21

Exanthema subitum [sixth disease] due to human herpesvirus 6

2016

2017

2018

2019

2020

2021

2022

2023

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 2023 edition of ICD-10-CM B08.21 became effective on October 1, 2022.
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
2023 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
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]
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 v40.0):

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
2023 (effective 10/1/2022): 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 2023 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 2023 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
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 2023 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
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.

2023 ICD-10-CM Diagnosis Code B08.21

Exanthema subitum [sixth disease] due to human herpesvirus 6

Certain infectious and parasitic diseases

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

Exanthema subitum [sixth disease]

Exanthema subitum [sixth disease], unspecified

Exanthema subitum [sixth disease], unspecified

Unspecified viral infection characterized by skin and mucous membrane lesions

Exanthema subitum [sixth disease], unspecified

Exanthema subitum [sixth disease], unspecified