Non-Billable / Non-Specific Code
ICD-10-CM Z20 is the diagnosis code for Contact with and (suspected) exposure to communicable diseases. This code falls under the section "Persons with potential health hazards related to communicable diseases" within Chapter 21 â Factors influencing health status and contact with health services (Z00-Z99). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as Z20. They are mutually exclusive:
The following conditions are not included in Z20. If the patient has both, code each condition separately:
Understanding where Z20 sits in the ICD-10-CM classification helps ensure proper coding:
No, Z20 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
Z20 is the ICD-10-CM diagnosis code for "Contact with and (suspected) exposure to communicable diseases". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
Z20 is located in Section Z20-Z29 â "Persons with potential health hazards related to communicable diseases" within Chapter 21 of the ICD-10-CM Tabular List.
Z20 has 10 sub-code(s) that provide more specific detail: Z20.0, Z20.1, Z20.2, Z20.3, Z20.4 and more.
Use Z20 when the patients documented diagnosis matches "Contact with and (suspected) exposure to communicable diseases" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Contact with and (suspected) exposure to communicable diseases is Z20.
No, Z20 is non-billable. Use a more specific sub-code for primary diagnosis billing.
Z20 is in Chapter 21 of the ICD-10-CM Tabular List.
Type 1 Excludes for Z20 include: carrier of infectious disease (Z22.-); diagnosed current infectious or parasitic disease -see Alphabetic Index.
Yes, Z20 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.