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Patient has colorectal liver metastases. Yttrium 90 mapping arteriogram performed. Documentation indicates that left gastric artery microcoil embolization performed with post coil embolization arteriogram, right gastric artery embolization with post embolization imaging, medial branch gastroduodenal artery embolization with post embolization imaging, and lateral branch gastoduodenal artery embolization with post imaging are all performed. I am thinking this is one surgical field and would be reported with codes 37204 x 1 and 75898 x 1 (2013 case). The facility wants to report the embolization x 3 for the three separate vessels. Would this be considered one surgical field or more?