Convert to ICD-10-CM: 
378.9 converts approximately to:
- 2015/16 ICD-10-CM H51.9 Unspecified disorder of binocular movement
 ICD-9-CM Volume 2 Index entries containing back-references to 
378.9:
- Contraction, contracture, contracted muscle (postinfectional) (postural) NEC 728.85 muscle (postinfectional) (postural) NEC 728.85 
  ocular muscle (see also Strabismus) 378.9 ocular muscle (see also Strabismus) 378.9  paralytic (see also Strabismus, paralytic) 378.50 paralytic (see also Strabismus, paralytic) 378.50 
 
 
- Disease, diseased - see also Syndrome
- Imbalance 781.2  eye muscle NEC 378.9 eye muscle NEC 378.9  heterophoria - see Heterophoria heterophoria - see Heterophoria
 
 
- Insufficiency, insufficient muscle muscle  heart - see Insufficiency, myocardial heart - see Insufficiency, myocardial
  ocular (see also Strabismus) 378.9 ocular (see also Strabismus) 378.9
 
 
- Ophthalmoplegia (see also Strabismus) 378.9 ataxia-areflexia syndrome 357.0 ataxia-areflexia syndrome 357.0 
  bilateral 378.9 bilateral 378.9
  internal (complete) (total) 367.52 internal (complete) (total) 367.52 
  supranuclear, progressive 333.0 supranuclear, progressive 333.0 
  unilateral 378.9 unilateral 378.9
 
- Overactive - see also Hyperfunction eye muscle (see also Strabismus) 378.9 eye muscle (see also Strabismus) 378.9
 
- Paralysis, paralytic (complete) (incomplete) 344.9  ocular 378.9 ocular 378.9
 
- Squint (see also Strabismus) 378.9 accommodative (see also Esotropia) 378.00 accommodative (see also Esotropia) 378.00 
  concomitant (see also Heterotropia) 378.30 concomitant (see also Heterotropia) 378.30 
 
- Strabismus (alternating) (congenital) (nonparalytic) 378.9 concomitant (see also Heterotropia) 378.30 concomitant (see also Heterotropia) 378.30   convergent (see also Esotropia) 378.00 convergent (see also Esotropia) 378.00 
  divergent (see also Exotropia) 378.10 divergent (see also Exotropia) 378.10 
 
  convergent (see also Esotropia) 378.00 convergent (see also Esotropia) 378.00 
  divergent (see also Exotropia) 378.10 divergent (see also Exotropia) 378.10 
  due to adhesions, scars - see Strabismus, mechanical due to adhesions, scars - see Strabismus, mechanical
  in neuromuscular disorder NEC 378.73 in neuromuscular disorder NEC 378.73 
  mechanical 378.60 mechanical 378.60   due to due to   Brown's tendon sheath syndrome 378.61 Brown's tendon sheath syndrome 378.61 
   specified musculofascial disorder NEC 378.62 specified musculofascial disorder NEC 378.62 
 
 
  paralytic 378.50 paralytic 378.50   third or oculomotor nerve (partial) 378.51 third or oculomotor nerve (partial) 378.51 
  fourth or trochlear nerve 378.53 fourth or trochlear nerve 378.53 
  sixth or abducens nerve 378.54 sixth or abducens nerve 378.54