2007 ICD-9-CM Procedure 89.12 Nasal function study Technique for measuring air pressure and the rate of airflow in the nasal cavity during respiration. 89.12 is a specific code that can be used to specify a procedure 89.12 contains 2 index entries View the full Volume 3 89.* hierarchy 89.12 also known as: Rhinomanometry Index entries containing 89.12: Function study -- see also Scan, radioisotope nasal 89.12 Rhinomanometry 89.12