Oct 19, 2006 Page 1 Ms. Von Kirchoff's ICD-9-CM knowledge base stems from a variety of experience in all .. Note: See Section I.b.3., General Coding Guidelines , Level of . Example. ◇ A patient is referred to a radiologist for an abdominal CT scan with a .. AHA Coding Clinic for ICD-9-CM, Vol 19, Number 4,.