Z20.09
✓ BillableContact with and (suspected) exposure to other intestinal infectious diseases
Factors influencing health status and contact with health services (Z00-Z99)
❌ Excludes1
inheritedRules inherited from parent codes in the hierarchy.
- • carrier of infectious disease (Z22.-)
- • diagnosed current infectious or parasitic disease -see Alphabetic Index
⚠️ Excludes2
inheritedRules inherited from parent codes.
- • personal history of infectious and parasitic diseases (Z86.1-)
Clinical Description
ICD-10-CM code Z20.09 represents contact with and (suspected) exposure to other intestinal infectious diseases. This code falls under the Factors influencing health status and contact with health services (Z00-Z99) classification. It is a billable/specific code valid for HIPAA-covered transactions as of October 1, 2025 (FY2026). This code can be used to indicate a diagnosis for reimbursement purposes on insurance claims.
This is a 6-character code at the 5th level of specificity. This is the most specific code available in this subcategory. Coders should note that Z20.09 has 2 Excludes1 restriction(s) — codes that cannot be reported together on the same claim.
Frequently Asked Questions
What is ICD-10 code Z20.09?
ICD-10-CM code Z20.09 is "Contact with and (suspected) exposure to other intestinal infectious diseases". It belongs to the category: Factors influencing health status and contact with health services (Z00-Z99).
Is Z20.09 a billable ICD-10 code?
Yes, Z20.09 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
What codes are excluded with Z20.09?
Z20.09 has 2 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.
Can Z20.09 be coded with other codes?
Z20.09 has 1 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.
Related Codes in Z20.0
Other codes in the same category that may be relevant for differential coding:
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Data Source
CMS ICD-10-CM 2026 Tabular List
Updated October 1, 2025 (FY2026)