Guidelines › Observation Z codes (Z03, Z04)
Observation Z codes (Z03, Z04)
Official text from the FY2027 ICD-10-CM Official Guidelines for Coding and Reporting. The wording is quoted exactly.
Guidelines I.C.21.c.6
“The observation codes are not for use if an injury or illness or any signs or symptoms related to the suspected condition are present.”
“The observation codes are primarily to be used as a principal/first-listed diagnosis.”
“These codes should not be used when the condition is confirmed.”
Where this applies
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