Instructor’s Guide for ICD-9-CM Diagnostic Coding and ...

When an immunization administration accompanies a preventive service visit, the preventive service CPT (9938x / 9939x) must appear with a ‘25’ modifier on the claim form. Without modifier ‘25’, these coding combinations will cause the claim to deny per CCI edit; Must use ICD 10 CPT code Z 23 as one of the diagnosis codes. ................
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