Question: Idaho Subscriber Answer: • Q9965 - Low osmolar contrast material, 100-199 mg/ml iodine concentration, per ml • Q9966 -- ... 200-299 mg/ml iodine concentration, per ml • Q9967 -- ... 300-399 mg/ml iodine concentration, per ml. Coding is based on the strength or quantity of iodine (mg) in each milliliter (ml) injected, so check with your physician about the concentration and type of low osmolar contrast he used.