H51.2 is a "category code," which means it's non-billable. Billable codes require more specificity. Use the list below to navigate to codes that are more specific:
10
H51.20
Internuclear ophthalmoplegia, unspecified eye
Billable
10
H51.21
Internuclear ophthalmoplegia, right eye
Billable
10
H51.22
Internuclear ophthalmoplegia, left eye
Billable
10
H51.23
Internuclear ophthalmoplegia, bilateral
Billable