ICD-10-CM > H00-H59 > H40-H42 > H40 > H40.0 > H40.03 H40.03 Anatomical narrow angle Non-Billable/Non-Specific Applicable To Primary angle closure suspect Codes H40.031Anatomical narrow angle, right eyeH40.032Anatomical narrow angle, left eyeH40.033Anatomical narrow angle, bilateralH40.039Anatomical narrow angle, unspecified eye