ICD-10-CM > H00-H59 > H49-H52 > H50 > H50.5 H50.5 Heterophoria Non-Billable/Non-Specific Codes H50.50Unspecified heterophoriaH50.51EsophoriaH50.52ExophoriaH50.53Vertical heterophoriaH50.54CyclophoriaH50.55Alternating heterophoria