ICD-10-CM 2027
ICD-10 code for eye muscle extrinsic paralysis
From the official ICD-10-CM alphabetic index entry “Paralysis, paralytic (complete) (incomplete) › eye muscle (extrinsic)”. Page updated September 29, 2026.
About coding eye muscle extrinsic paralysis
The ICD-10-CM code for eye muscle extrinsic paralysis is H49.9 (Unspecified paralytic strabismus).
Within H49, choose H49.9 (Unspecified paralytic strabismus) only when documentation doesn't support a more specific option: third [oculomotor] nerve palsy (H49.0), fourth [trochlear] nerve palsy (H49.1), sixth [abducent] nerve palsy (H49.2), total (external) ophthalmoplegia (H49.3), progressive external ophthalmoplegia (H49.4) and other paralytic strabismus (H49.8).
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 123 (Neurological Eye Disorders, relative weight 0.822), 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 eye muscle extrinsic paralysis codes (official index)
- intrinsic
Common questions about eye muscle extrinsic paralysis ICD-10 codes
What is the ICD-10 code for eye muscle extrinsic paralysis?
- H49.9 — Unspecified paralytic strabismus.
Is H49.9 billable?
- Yes. H49.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can H49.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict H49.9 as a principal diagnosis.
Is H49.9 a CC or MCC?
- No. H49.9 is neither a CC nor an MCC under MS-DRG v44.0.