ICD-10-CM > H00-H59 > H15-H22 > H21 > H21.5 > H21.56 H21.56 Pupillary abnormalities Non-Billable/Non-Specific Applicable To Deformed pupilEctopic pupilRupture of sphincter, pupil Type 1 Excludes congenital deformity of pupil (Q13.2-) Codes H21.561Pupillary abnormality, right eyeH21.562Pupillary abnormality, left eyeH21.563Pupillary abnormality, bilateralH21.569Pupillary abnormality, unspecified eye