H50.55 Alternating heterophoria

Billable ICD-10-CM code, FY2026.

MS-DRG index

Defines the logic of DRG(s) 124-125 in MDC 02.

Approximate ICD-9-CM (GEMs)

• 378.45 Alternating hyperphoria

Code annotations containing back-references to H50.55

Back-references to H50

• Type 2 Excludes: H53.03 Strabismic amblyopia ("strabismus (H50.-)")

Diagnosis Index entries for H50.55

• Strabismus (congenital) (nonparalytic) › heterophoria › alternating

Nearby codes

• H50.50 Unspecified heterophoria
• H50.51 Esophoria
• H50.52 Exophoria
• H50.53 Vertical heterophoria
• H50.54 Cyclophoria
• H50.55 Alternating heterophoria (this code)
• H50.6 Mechanical strabismus
• H50.60 Mechanical strabismus, unspecified
• H50.61 Brown's sheath syndrome
• H50.611 Brown's sheath syndrome, right eye
• H50.612 Brown's sheath syndrome, left eye