ICD-10 Diagnosis Code Z20.821

Contact with and (suspected) exposure to Zika virus

Diagnosis Code Z20.821

ICD-10: Z20.821
Short Description: Contact with and (suspected) exposure to Zika virus
Long Description: Contact with and (suspected) exposure to Zika virus
This is the 2019 version of the ICD-10-CM diagnosis code Z20.821

Valid for Submission
The code Z20.821 is valid for submission for HIPAA-covered transactions.

New 2019 ICD-10 Code
Z20.821 is new to ICD-10 code set for the FY 2019, effective October 1, 2018. The National Center for Health Statistics (NCHS) has published an update to the ICD-10-CM diagnosis codes which became effective October 1, 2018. This is a new and revised code for the FY 2019 (October 1, 2018 - September 30, 2019).

Code Classification
  • Factors influencing health status and contact with health services (Z00–Z99)
    • Persons with potential health hazards related to communicable diseases (Z20-Z29)
      • Contact w and exposure to communicable diseases (Z20) (suspected)
Version 2019 Billable Code New Code Unacceptable Principal Diagnosis POA Exempt

Information for Medical Professionals


Code Edits
The following edits are applicable to this code:
Unacceptable principal diagnosis - There are selected codes that describe a circumstance which influences an individual’s health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Present on Admission (POA)
The code Z20.821 is exempt from POA reporting.

Index to Diseases and Injuries
References found for the code Z20.821 in the Index to Diseases and Injuries:


Replacement Code
This code replaces the following previously assigned ICD-10 code(s) listed below:
  • Z20.828 - Contact w and exposure to oth viral communicable diseases


ICD-10 Footnotes

General Equivalence Map Definitions
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

  • Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
  • No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
  • Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.

Present on Admission
The Present on Admission (POA) indicator is used for diagnosis codes included in claims involving inpatient admissions to general acute care hospitals. POA indicators must be reported to CMS on each claim to facilitate the grouping of diagnoses codes into the proper Diagnostic Related Groups (DRG). CMS publishes a listing of specific diagnosis codes that are exempt from the POA reporting requirement.

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Z20.820
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Z20.828