Guidelines › Contact and exposure Z codes (Z20, Z77)
Contact and exposure Z codes (Z20, Z77)
Official text from the FY2027 ICD-10-CM Official Guidelines for Coding and Reporting. The wording is quoted exactly.
Guidelines I.C.21.c.1
“Contact/exposure codes may be used as a first-listed code to explain an encounter for testing, or, more commonly, as a secondary code to identify a potential risk.”
Where this applies
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