ICD-10-CM Z20: Contact with and (suspected) exposure to communicable diseases

ICD-10-CM Diagnosis Code (2025)

Official Description for Z20

Contact with and (suspected) exposure to communicable diseases

Coding Notes & Guidelines for Z20

Excludes1: Not Coded Here
  • carrier of infectious disease (Z22.-)
  • diagnosed current infectious or parasitic disease -see Alphabetic Index
Excludes1: Not Coded Here
  • asymptomatic human immunodeficiency virus [HIV]
  • HIV infection status (Z21)
Excludes2: Not Included Here

personal history of infectious and parasitic diseases (Z86.1-)

Inclusion Terms

Contact with and (suspected) exposure to SARS-CoV-2

Child Codes (More Specific Codes for Z20):

Z20.0 - Contact with and (suspected) exposure to intestinal infectious diseases Z20.01 - Contact with and (suspected) exposure to intestinal infectious diseases due to Escherichia coli (E. coli) Z20.09 - Contact with and (suspected) exposure to other intestinal infectious diseases Z20.1 - Contact with and (suspected) exposure to tuberculosis Z20.2 - Contact with and (suspected) exposure to infections with a predominantly sexual mode of transmission Z20.3 - Contact with and (suspected) exposure to rabies Z20.4 - Contact with and (suspected) exposure to rubella Z20.5 - Contact with and (suspected) exposure to viral hepatitis Z20.6 - Contact with and (suspected) exposure to human immunodeficiency virus [HIV] Z20.7 - Contact with and (suspected) exposure to pediculosis, acariasis and other infestations Z20.8 - Contact with and (suspected) exposure to other communicable diseases Z20.81 - Contact with and (suspected) exposure to other bacterial communicable diseases Z20.810 - Contact with and (suspected) exposure to anthrax Z20.811 - Contact with and (suspected) exposure to meningococcus Z20.818 - Contact with and (suspected) exposure to other bacterial communicable diseases Z20.82 - Contact with and (suspected) exposure to other viral communicable diseases Z20.820 - Contact with and (suspected) exposure to varicella Z20.821 - Contact with and (suspected) exposure to Zika virus Z20.822 - Contact with and (suspected) exposure to COVID-19 Z20.828 - Contact with and (suspected) exposure to other viral communicable diseases Z20.89 - Contact with and (suspected) exposure to other communicable diseases Z20.9 - Contact with and (suspected) exposure to unspecified communicable disease

About ICD-10-CM Code Z20 (Contact with and)

ICD-10-CM code Z20 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM Z20 became effective on October 1, 2024.

This page provides detailed information about Z20 - Contact with and (suspected) exposure to communicable diseases. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Contact with and.