ICD-10 Code H57.09 – Other anomalies of pupillary function (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H57.09 – Other anomalies of pupillary function
What it is
H57.09 identifies abnormal pupil function that does not fit a more specific diagnosis. Use it when the chart documents an unspecified or other pupillary abnormality, such as abnormal reactivity or shape.
Clinical signs
Clinical features vary; refer to documentation. Findings may include unequal pupils, abnormal light response, or other pupillary irregularities noted on eye examination.
When to use this code
Use this code when the provider documents an “other” pupillary disorder and no more specific ICD-10-CM code applies. It is appropriate for nonspecific pupillary dysfunction recorded in the assessment, exam, or consultation note. Check documentation if the cause is known, because a more specific code may be available.
Do not use for
Do not use H57.09 for traumatic, neurologic, or drug-induced pupil findings when a more specific code is documented. Do not use it when the record supports a different eye disorder or a clearly named pupillary syndrome.
Coding tip
Code the most specific pupillary diagnosis documented, and use H57.09 only when the record supports an unspecified “other” anomaly.