ICD-10-CM 2027
ICD-10 code for heterotropia strabismus
From the official ICD-10-CM alphabetic index entry “Strabismus (congenital) (nonparalytic) › heterotropia”. Page updated September 29, 2026.
About coding heterotropia strabismus
The ICD-10-CM code for heterotropia strabismus is H50.40 (Unspecified heterotropia). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on H50.40.
Within H50.4, choose H50.40 (Unspecified heterotropia) only when documentation doesn't support a more specific option: Cyclotropia (H50.41), Monofixation syndrome (H50.42) and Accommodative component in esotropia (H50.43).
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 heterotropia strabismus codes (official index)
- intermittent H50.30 — Unspecified intermittent heterotropia
Common questions about heterotropia strabismus ICD-10 codes
What is the ICD-10 code for heterotropia strabismus?
- H50.40 — Unspecified heterotropia. More specific codes apply when the documentation supports them: H50.30.
What is the ICD-10 code for intermittent heterotropia strabismus?
- H50.30 — Unspecified intermittent heterotropia.
Is H50.40 billable?
- Yes. H50.40 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can H50.40 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict H50.40 as a principal diagnosis.
Is H50.40 a CC or MCC?
- No. H50.40 is neither a CC nor an MCC under MS-DRG v44.0.