Deuteranomaly

This code represents a mild form of red-green color blindness, specifically a dichromatic vision defect where the green-sensitive cones are present but have an abnormal spectral sensitivity. Individuals with deuteranomaly have difficulty distinguishing shades of red and green, often perceiving them as duller or similar.

Use this code when documentation explicitly states a diagnosis of deuteranomaly or "green-weakness." This diagnosis is typically made following color vision testing, such as the Ishihara plates or anomaloscope. It is appropriate for congenital or acquired forms of this specific color vision deficiency.

• Differentiate from deuteranopia (H53.52), which is a complete absence of green-sensitive cones.
• Ensure the documentation specifies "deuteranomaly" and not a general "red-green color blindness" if a more specific code is available.
• Do not code if the documentation only states "color blindness, unspecified" (H53.50).