ICD-10-CM > H00-H59 > H49-H52 > H52 > H52.2 H52.2 Astigmatism Non-Billable/Non-Specific Codes H52.20Unspecified astigmatismH52.201Unspecified astigmatism, right eyeH52.202Unspecified astigmatism, left eyeH52.203Unspecified astigmatism, bilateralH52.209Unspecified astigmatism, unspecified eyeH52.21Irregular astigmatismH52.211Irregular astigmatism, right eyeH52.212Irregular astigmatism, left eyeH52.213Irregular astigmatism, bilateralH52.219Irregular astigmatism, unspecified eyeH52.22Regular astigmatismH52.221Regular astigmatism, right eyeH52.222Regular astigmatism, left eyeH52.223Regular astigmatism, bilateralH52.229Regular astigmatism, unspecified eye