Which ICD-10 code reflects astigmatism for both eyes?

The code that reflects astigmatism for both eyes is H52.203. This specific ICD-10 code is used to indicate bilateral astigmatism, meaning that the condition affects both eyes. The structure of the code signifies the type of astigmatism and the laterality, confirming that it pertains to both eyes.

Additional context regarding the other choices illustrates that H52.01 and H52.02 pertain to astigmatism, but are designated for unilateral conditions—specifically for the right and left eyes respectively. H52.4, on the other hand, encompasses other types of refractive errors and does not explicitly indicate astigmatism. Thus, H52.203 is the only code that accurately captures the requirement of astigmatism being present in both eyes, which is why it is the correct answer.