D0251 requires indication of which side of the mouth the image was taken on. It must be reported twice. Once for right side and once for left side. Per ADA, the two digit codes of "20" and "30" is for the image captured on the left side and "10" and "40" is for the right side need to be in field 25 in claim form.
D0250 may have more than one image taken and each needs to be listed separately with area indicated, not combined to multiple images on one line.