ICD-10 Code H53.61 – Abnormal dark adaptation curve (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H53.61 – Abnormal dark adaptation curve
What it is
H53.61 identifies an abnormal dark adaptation curve, meaning the eye does not adjust to darkness in the expected way. Use it when documentation specifically notes an abnormal dark-adaptation test or related finding.
Clinical signs
Clinical features vary; refer to documentation. Typical references describe delayed or impaired adjustment to low-light conditions, often identified during specialized visual testing rather than by routine exam alone.
When to use this code
Use H53.61 when the provider documents an abnormal dark adaptation curve as a diagnostic finding. It may appear in ophthalmology records, functional vision testing, or evaluation of night-vision complaints. Code only when the abnormal curve is clearly stated.
Do not use for
Do not use this code for general blurred vision, night blindness, or other visual complaints unless the record specifically identifies an abnormal dark adaptation curve. Check documentation if the finding is not explicit.
Coding tip
Assign H53.61 only when the abnormal dark-adaptation result is documented; otherwise, code the reported symptom or underlying condition instead.