2007 ICD-9-CM Procedure 12.21 Diagnostic aspiration of anterior chamber of eye 12.21 is a specific code that can be used to specify a procedure 12.21 contains 3 index entries View the full Volume 3 12.* hierarchy Index entries containing 12.21: Aspiration anterior chamber, eye (therapeutic) 12.91 diagnostic 12.21 aqueous (eye) (humor) (therapeutic) 12.91 diagnostic 12.21 eye (anterior chamber) (therapeutic) 12.91 diagnostic 12.21