Check your op report against these examples. • Reoperations or operations that go through areas where the patient had previous surgery. • Presence of excessively large surgical specimen (especially in tumor surgery). • Unusual bleeding. "Control of bleeding cannot be billed separately, but unusual bleeding can become a nightmare to control," Bucknam notes. • Extensive trauma (especially if your physician specializes in nerve reconstruction or spine surgery). • Patients who cannot cooperate with care (such as those with epilepsy, tremors, or altered mental status). • Services rendered that are significantly more complex than those described for the CPT code in question.