ICD-10 Code H05.313 – Atrophy of bilateral orbit (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H05.313 – Atrophy of bilateral orbit
What it is
H05.313 identifies atrophy, or wasting, of the tissues within both orbits. It is used when documentation specifies bilateral orbital atrophy rather than a different orbital disorder.
Clinical signs
Clinical features vary; refer to documentation. Commonly noted findings may include a sunken appearance of both eyes, reduced orbital volume, or visible asymmetry on exam or imaging.
When to use this code
Use this code when the provider documents bilateral atrophy of the orbit, including cases described as bilateral orbital wasting or shrinkage. Code it from the record, not from assumptions based on eye appearance alone. If the note does not clearly specify both orbits, check documentation.
Do not use for
Do not use it for unilateral orbital atrophy or for nonspecific eye findings such as enophthalmos without documented orbital atrophy. Check documentation if the record describes a different orbital abnormality.
Coding tip
Confirm that the provider documents “bilateral” and “atrophy” together before assigning H05.313.