vulvar labial hematoma

I have a pregnant patient who presented at 31 weeks with a vulvar labial hematoma the size of a softball. My physician did an evacuation of the hematoma and ligation of vessels with vaginal packing. I am having trouble finding a good CPT code to use for this procedure. Any suggestions?

re: vulvar labial hematoma

57022-Incision and drainage of vaginal hematoma, obstetrical/postpartum
57023-Non-obstetrical.