AHA Coding Clinic® for HCPCS - 2018 Issue 2; For Your Information
Deletion of biosimilar modifiers
The biosimilar modifiers ZA, ZB, and ZC were created to distinguish between biosimilar products that appeared in the same HCPCS code but made by different manufacturers. However, with the establishment of new HCPCS codes Q5103 and Q5104, modifiers ZA, ZB, and ZC are no longer necessary and were discontinued as of April 1, 2018. ...
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