What modifier is appropriate for these two seperate codes? I don't feel 59 is appropriate because its not a different session & its not on a different body organ site. Both procedures are performed at same session & same eye however, different reasons...cataract & Glaucoma. Cahaba has split the charges & paid for the 66984 however, denied the 0192T CO16 - Claim/service lacks information which is needed for adjudication. Assuming they need op notes or modifier besides the LT ?