The list that follows provides an overview of the codes, with descriptions, a brief explanation of when the code should be. used, and a clarification of what the effect of choosing a particular code may be. You can also access the full list of codes, along with descriptions, in the instructions for Form 1095-C.
I went to my doctor with the same problem of the big toe toenail curling. He said it was due to toenail fungus, which I knew I had on my other toes. I'll be trying the meds he prescribed to deal with the fungus and hope to find that the big toe nails straighten out as well.
1 The toes bend up at the joint where the toes and the foot meet. They bend down at the middle joints and at the joints nearest the tip of the toes. This causes the toes to curl down toward the floor.  A mallet toe bends down at the joint closest to the tip of the toe.