All ICD10 Codes

H51.21

Billable
ChapterH00–H59
Ranksubcategory
Official Description

Internuclear ophthalmoplegia, right eye

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Billable/specific code (valid for reimbursement).
  • •Chapter 7: Diseases of the Eye and Adnexa (H00-H59).
General instructions are available for the parent sections:
View CH7 NotesView H49-H52 Notes

Clinical Hierarchy

CH7Diseases of the eye and adnexa (H00-H59)
H49-H52Disorders of ocular muscles, binocular movement, accommodation and refraction (H49-H52)
H51Other disorders of binocular movement
H51.2Internuclear ophthalmoplegia
H51.21Internuclear ophthalmoplegia, right eye

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to H51.21:

blockH49-H52
Disorders of ocular muscles, binocular movement, accommodation and refraction (H49-H52)
View context instructions
chapterCH7
Diseases of the eye and adnexa (H00-H59)
View context instructions

MS-DRG Classification

2026 v43.1

This code is grouped within the following Diagnosis Related Group(s) for clinical reimbursement:

DRG 091
Other Disorders of Nervous System with MCC
DRG 092
Other Disorders of Nervous System with CC
DRG 093
Other Disorders of Nervous System without CC/MCC

Cross Reference

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