Question: What code should I report when my provider performs a cisternal C1-C2 puncture? Michigan Subscriber Answer: It depends on whether or not there was a separate injection for medication or another substance. Do this: Go back and check the notes to see if there was a substance injection in addition to the puncture. Then choose from the following codes: Drug/substance alert: If applicable, be sure to code for the supply of the drug or substance your provider injects. Some drugs/ substances that they might use during 61055 service include: