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Anesthesia Coding Alert

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Modifiers ZA and ZC Explained

Published on Thu Oct 17, 2013

Question: Do you have any information on the correct use of modifiers ZA and ZC? I was told these can be used for prone position (ZA) and extracorporeal circulation (ZC), but am not sure about details. California Subscriber Answer: Modifiers ZA and ZC are anesthesia modifiers specifically used for Medi-Cal insurance prior to March 1, 2011. Services after that date should be [...]
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