ICD-10-CM 2027
ICD-10 code for Pseudorubella
From the official ICD-10-CM alphabetic index entry “Pseudorubella”. Page updated September 29, 2026.
About coding Pseudorubella
The ICD-10-CM code for Pseudorubella is B08.20 (Exanthema subitum [sixth disease], unspecified).
Within B08.2, choose B08.20 (unspecified) only when documentation doesn't support a more specific option: due to human herpesvirus 6 (B08.21) and due to human herpesvirus 7 (B08.22).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 791 (Prematurity with Major Problems, relative weight 4.1075), DRG 793 (Full Term Neonate with Major Problems, relative weight 4.2195), DRG 865 (Viral Illness with MCC, relative weight 1.3485) and DRG 866 (Viral Illness without MCC, relative weight 0.8692), in MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period) and MDC 18 (Infectious and Parasitic Diseases, Systemic or Unspecified Sites), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
Common questions about Pseudorubella ICD-10 codes
What is the ICD-10 code for Pseudorubella?
- B08.20 — Exanthema subitum [sixth disease], unspecified.
Is B08.20 billable?
- Yes. B08.20 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can B08.20 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict B08.20 as a principal diagnosis.
Is B08.20 a CC or MCC?
- No. B08.20 is neither a CC nor an MCC under MS-DRG v44.0.