ICD-10-CM > H00-H59 > H49-H52 > H51 > H51.2 H51.2 Internuclear ophthalmoplegia Non-Billable/Non-Specific Codes H51.20Internuclear ophthalmoplegia, unspecified eyeH51.21Internuclear ophthalmoplegia, right eyeH51.22Internuclear ophthalmoplegia, left eyeH51.23Internuclear ophthalmoplegia, bilateral