Z20

Z20: Contact with and (suspected) exposure to communicable diseases

Non-billable headerICD-10-CM

Z20 is a non-billable header ICD-10-CM code for contact with and (suspected) exposure to communicable diseases. It cannot be billed on its own: choose one of the more specific child codes below.

Excludes1: never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

carrier of infectious disease (Z22.-)
diagnosed current infectious or parasitic disease -see Alphabetic Index

Excludes2: not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

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

Other codes that can never be billed with Z20

Their own Excludes1 notes name this code, so the conflict is not listed above.

Z21Asymptomatic human immunodeficiency virus [HIV] infection status
B20Human immunodeficiency virus [HIV] disease

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead Z20

10 child codes. Green means billable.