Z20
Non-billableContact with and (suspected) exposure to communicable diseases
Z20 is the ICD-10-CM code for Contact with and (suspected) exposure to communicable diseases. It is a non-billable category code — use a more specific child code such as Z20.0 for billing.
- Status
- Header (non-billable)
- Chapter
- Z00-Z99
- Subcodes
- 10
- Edition
- FY2026
Z00-Z99 Factors influencing health status and contact with health services
What this means — in plain language
MedlinePlus · NIHWhat are infectious diseases? Germs, or microbes, are found everywhere - in the air, soil, and water. There are also germs on your skin and in your body. Many of them are harmless, and some can even be helpful. But some of them can make you sick. Infectious diseases are diseases that are caused by germs. What are the different types of germs that cause infectious diseases? There are four main types of germs:…
Read more about Infectious Diseases at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Excludes1 — not coded here
- •carrier of infectious disease (Z22.-)
- •diagnosed current infectious or parasitic disease -see Alphabetic Index
Excludes2 — not included here
- •personal history of infectious and parasitic diseases (Z86.1-)
Medications indicated for this condition
FDA labelingDrugs whose FDA labeling lists this condition's category among its indications. Informational only — not a treatment recommendation or medical advice.
Conditions mapped to this code
MedlinePlus · NIHPlain-language health-topic references grounded in MedlinePlus (NIH/NLM).
Frequently asked questions
- What is ICD-10 code Z20?
- Z20 is the ICD-10-CM code for "Contact with and (suspected) exposure to communicable diseases". It falls under Z00-Z99 Factors influencing health status and contact with health services.
- Is Z20 a billable code?
- No — Z20 is a non-billable header code. Use a more specific child code (such as Z20.0) for billing.
- What is excluded from Z20?
- Excludes1 (not coded here): carrier of infectious disease (Z22.-); diagnosed current infectious or parasitic disease -see Alphabetic Index.
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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