ICD-10 Code H04.159 – Secondary lacrimal gland atrophy, unspecified lacrimal gland (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H04.159 – Secondary lacrimal gland atrophy, unspecified lacrimal gland
What it is
This code identifies secondary atrophy of a lacrimal gland when the affected gland is not specified. It means the gland has become smaller or less functional due to an underlying cause, rather than a primary disease.
Clinical signs
Clinical features may include reduced tear production, dry eye symptoms, or visible lacrimal gland shrinkage on examination or imaging. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record documents secondary lacrimal gland atrophy and does not identify left or right gland involvement. It is appropriate when the provider links the atrophy to another condition or cause. If the chart only says dry eye without gland atrophy, check documentation.
Do not use for
Do not use this code for primary lacrimal gland disorders or for dry eye alone without documented atrophy. Avoid it when the chart specifies a different lacrimal gland site or a more specific diagnosis.
Coding tip
Confirm both the secondary nature and the unspecified gland site before assigning H04.159.