ICD-10-CM > H00-H59 > H49-H52 > H52 > H52.2 > H52.20 H52.20 Unspecified astigmatism Non-Billable/Non-Specific Codes H52.201Unspecified astigmatism, right eyeH52.202Unspecified astigmatism, left eyeH52.203Unspecified astigmatism, bilateralH52.209Unspecified astigmatism, unspecified eye