ICD-10-CM > H00-H59 > H00-H05 > H05 > H05.3 > H05.31 H05.31 Atrophy of orbit Non-Billable/Non-Specific Codes H05.311Atrophy of right orbitH05.312Atrophy of left orbitH05.313Atrophy of bilateral orbitH05.319Atrophy of unspecified orbit