2007 ICD-9-CM Procedure 16.21 Ophthalmoscopy Examination of the interior of the eye with an ophthalmoscope. 16.21 is a specific code that can be used to specify a procedure 16.21 contains 2 index entries View the full Volume 3 16.* hierarchy Index entries containing 16.21: Examination (for) ophthalmoscopic 16.21 Ophthalmoscopy 16.21