ICD-10-CM 2027
ICD-10 code for heterophoria strabismus
From the official ICD-10-CM alphabetic index entry “Strabismus (congenital) (nonparalytic) › heterophoria”. Page updated September 29, 2026.
About coding heterophoria strabismus
The ICD-10-CM code for heterophoria strabismus is H50.50 (Unspecified heterophoria). The official index lists 5 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on H50.50.
Within H50.5, choose H50.50 (Unspecified heterophoria) only when documentation doesn't support a more specific option: Esophoria (H50.51), Exophoria (H50.52), vertical heterophoria (H50.53), Cyclophoria (H50.54) and alternating heterophoria (H50.55).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 124 (Other Disorders of the Eye with MCC or Thrombolytic Agent, relative weight 1.2471) and DRG 125 (Other Disorders of the Eye without MCC, relative weight 0.7702), in MDC 02 (Diseases and Disorders of the Eye), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific heterophoria strabismus codes (official index)
Common questions about heterophoria strabismus ICD-10 codes
What is the ICD-10 code for heterophoria strabismus?
- H50.50 — Unspecified heterophoria. More specific codes apply when the documentation supports them: H50.55, H50.54, H50.51, H50.52 and others below.
What is the ICD-10 code for alternating heterophoria strabismus?
- H50.55 — Alternating heterophoria.
What is the ICD-10 code for cyclophoria heterophoria strabismus?
- H50.54 — Cyclophoria.
What is the ICD-10 code for esophoria heterophoria strabismus?
- H50.51 — Esophoria.
What is the ICD-10 code for exophoria heterophoria strabismus?
- H50.52 — Exophoria.
What is the ICD-10 code for vertical heterophoria strabismus?
- H50.53 — Vertical heterophoria.
Is H50.50 billable?
- Yes. H50.50 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can H50.50 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict H50.50 as a principal diagnosis.
Is H50.50 a CC or MCC?
- No. H50.50 is neither a CC nor an MCC under MS-DRG v44.0.