new stent codes

With the new cardiac stent codes and modifiers, I am now second guessing everything. I have a physician that stented the AV circumflex, a stent to the ostial LM, and another stent to the VG supplying the left descending artery.
Could I please get some help from anyone that understands these 5 new modifiers and how I would bill for the stents?
I was told by another coder here to bill

92928.LD
92929.LC
92929.LM???
Thank you,