• nystagmus and other irregular eye movements (H55)
  1. H51 Other disorders of binocular movement

    1. H51.0 Palsy (spasm) of conjugate gaze

    2. H51.1 Convergence insufficiency and excess

      1. H51.11 Convergence insufficiency

      2. H51.12 Convergence excess

    3. H51.2 Internuclear ophthalmoplegia

      1. H51.20 Internuclear ophthalmoplegia, unspecified eye

      2. H51.21 Internuclear ophthalmoplegia, right eye

      3. H51.22 Internuclear ophthalmoplegia, left eye

      4. H51.23 Internuclear ophthalmoplegia, bilateral

    4. H51.8 Other specified disorders of binocular movement

    5. H51.9 Unspecified disorder of binocular movement

Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.