Achromatopsia

This code signifies achromatopsia, a rare, inherited retinal disorder characterized by the complete or partial absence of cone photoreceptor function. Individuals with this condition experience severe impairment of color vision, photophobia, nystagmus, and significantly reduced visual acuity. It results in a monochromatic or severely limited color perception.

Assign this code when documentation clearly indicates a diagnosis of achromatopsia, often presenting with symptoms such as complete color blindness, extreme light sensitivity, and involuntary eye movements. This diagnosis is typically confirmed through electroretinography (ERG) and genetic testing.

• Differentiate from other forms of color vision deficiency; this code is specific to achromatopsia.
• Ensure documentation specifies "achromatopsia" and not a general "color blindness" for accurate coding.
• Consider co-occurring conditions like nystagmus (H55.0-) or photophobia (H53.13-) if documented.