ICD-10-CM 2027
ICD-10 code for Zika virus contact
From the official ICD-10-CM alphabetic index entry “Contact (with) › Zika virus”. Page updated September 29, 2026.
About coding Zika virus contact
The ICD-10-CM code for Zika virus contact is Z20.821 (Contact with and (suspected) exposure to Zika virus).
Within Z20.82 (contact with and (suspected) exposure to other viral communicable diseases), Z20.821 is specifically for contact with and (suspected) exposure to Zika virus. Related codes cover varicella (Z20.820), COVID-19 (Z20.822) and other viral communicable diseases (Z20.828).
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 795 (Normal Newborn, relative weight 0.2022) and DRG 951 (Other Factors Influencing Health Status, relative weight 0.5577), in MDC 15 (Newborns and Other Neonates with Conditions Originating in the Perinatal Period) and MDC 23 (Factors Influencing Health Status and Other Contacts with Health Services), 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 Zika virus contact ICD-10 codes
What is the ICD-10 code for Zika virus contact?
- Z20.821 — Contact with and (suspected) exposure to Zika virus.
Is Z20.821 billable?
- Yes. Z20.821 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z20.821 be used as a principal diagnosis?
- No. It is not acceptable as the principal diagnosis for an inpatient stay; it may be reported as a secondary diagnosis.
Is Z20.821 a CC or MCC?
- No. Z20.821 is neither a CC nor an MCC under MS-DRG v44.0.