2007 ICD-9-CM Procedure 89.66 Measurement of mixed venous blood gases 89.66 is a specific code that can be used to specify a procedure 89.66 contains 3 index entries View the full Volume 3 89.* hierarchy Index entries containing 89.66: Measurement arterial blood gases 89.65 blood gases venous 89.66 mixed venous blood gases 89.66 venous blood gases 89.66