H49Paralytic strabismus

H49 is the ICD-10-CM diagnosis code for paralytic strabismus. It belongs to block H49-H52 (disorders of ocular muscles, binocular movement, accommodation and refraction) and chapter 7 (diseases of the eye and adnexa). It is a header code, so it can't be reported by itself; one of its 7 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: H49.0 (palsy), H49.1 (palsy), H49.2 (palsy), H49.3 (ophthalmoplegia), H49.4 (ophthalmoplegia), H49.8 (strabismus) and H49.9 (strabismus).

The conditions in its Excludes2 note aren't part of H49, but may be coded alongside it if the patient has both: internal ophthalmoplegia (H52.51-), internuclear ophthalmoplegia (H51.2-) and progressive supranuclear ophthalmoplegia (G23.1).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.