ICD-10-CM 2027
ICD-10 code for rubella
From the official ICD-10-CM alphabetic index entry “Rubella (German measles)”. Page updated September 29, 2026.
About coding rubella
The ICD-10-CM code for rubella is B06.9 (Rubella without complication). The official index lists 9 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on B06.9.
Within B06, choose B06.9 (without complication) only when documentation doesn't support a more specific option: with neurological complications (B06.0) and with other complications (B06.8).
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 865 (Viral Illness with MCC, relative weight 1.3485) and DRG 866 (Viral Illness without MCC, relative weight 0.8692), in 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.
More specific rubella codes (official index)
- complication NEC B06.09 — Other neurological complications of rubella
- neurological B06.00 — Rubella with neurological complication, unspecified
- congenital P35.0 — Congenital rubella syndrome
- contact Z20.4 — Contact with and (suspected) exposure to rubella
- exposure to Z20.4 — Contact with and (suspected) exposure to rubella
- maternal
- manifest rubella in infant P35.0 — Congenital rubella syndrome
- care for (suspected) damage to fetus O35.3 — Maternal care for (suspected) damage to fetus from viral disease in mother
- suspected damage to fetus affecting management of pregnancy O35.3 — Maternal care for (suspected) damage to fetus from viral disease in mother
- specified complications NEC B06.89 — Other rubella complications
Common questions about rubella ICD-10 codes
What is the ICD-10 code for rubella?
- B06.9 — Rubella without complication. More specific codes apply when the documentation supports them: B06.09, B06.00, P35.0, Z20.4 and others below.
What is the ICD-10 code for complication nec rubella?
- B06.09 — Other neurological complications of rubella.
What is the ICD-10 code for congenital rubella?
- P35.0 — Congenital rubella syndrome.
What is the ICD-10 code for contact rubella?
- Z20.4 — Contact with and (suspected) exposure to rubella.
What is the ICD-10 code for exposure to rubella?
- Z20.4 — Contact with and (suspected) exposure to rubella.
Is B06.9 billable?
- Yes. B06.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can B06.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict B06.9 as a principal diagnosis.
Is B06.9 a CC or MCC?
- No. B06.9 is neither a CC nor an MCC under MS-DRG v44.0.