1. ICD-10-CM Codes
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2. H00-H59 Diseases of the eye and adnexa
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3. H49-H52 Disorders of ocular muscles, binocular movement, accommodation and refraction
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4. H50- Other strabismus
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2019 ICD-10-CM Diagnosis Code H50.40

Unspecified heterotropia

2016 2017 2018 2019 Billable/Specific Code

• H50.40 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• The 2019 edition of ICD-10-CM H50.40 became effective on October 1, 2018.
• This is the American ICD-10-CM version of H50.40 - other international versions of ICD-10 H50.40 may differ.

• Comitant strabismus
• Comitant strabismus (eye condition)
• Constant squint
• Heterotropia
• Heterotropia (eye condition)

• Misalignment of the visual axes of the eyes. In comitant strabismus the degree of ocular misalignment does not vary with the direction of gaze. In noncomitant strabismus the degree of misalignment varies depending on direction of gaze or which eye is fixating on the target. (miller, walsh & hoyt's clinical neuro-ophthalmology, 4th ed, p641)
• Strabismus is the intermittent or constant misalignment of an eye so that its line of vision is not pointed at the same object as the other eye. Strabismus is caused by an imbalance in the extraocular muscles which control the positioning of the eyes. Strabismus is normal in newborns but should resolve by the time the baby is 6 months old. In older children with strabismus, the brain may learn to ignore the input from one eye, and this may lead to amblyopia, a potentially permanent decrease in vision in that eye if not corrected.

• 124 Other disorders of the eye with mcc
• 125 Other disorders of the eye without mcc

Convert H50.40 to ICD-9-CM

• 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
• 2017 (effective 10/1/2016): No change
• 2018 (effective 10/1/2017): No change
• 2019 (effective 10/1/2018): No change

• Microtropia H50.40
• Strabismus (congenital) (nonparalytic) H50.9
  ICD-10-CM Diagnosis Code H50.9

  Unspecified strabismus

  2016 2017 2018 2019 Billable/Specific Code
  • concomitant H50.40
  • heterotropia H50.40

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.