ICD-10-CM > H00-H59 > H49-H52 > H52 > H52.2 > H52.22 H52.22 Regular astigmatism Non-Billable/Non-Specific Codes H52.221Regular astigmatism, right eyeH52.222Regular astigmatism, left eyeH52.223Regular astigmatism, bilateralH52.229Regular astigmatism, unspecified eye