Guyon's canal exploration cpt code??

I have a surgery that I am stumped on, and was hoping someone could help me figure this one out.
my doc was planning on removing a mass but after getting closer to the "mass" he realized it was a thrombosed artery. He did not remove anything after finding this out. He just closed the incision. He is calling it a Wrist mass exploration After reading the note, it sounds like a Guyon's canal exploration. I am not finding anything that comes closed to this, so I am thinking this should be an...

Guyon's canal exploration cpt code??