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ICD-10-CM · FY 2026 APRIL UPDATE

S04

Injury of cranial nerve

Diagnosis reference

Nonbillable category

This entry is a category or subcategory. Choose the appropriate billable descendant based on the clinical documentation.

Effective periodOctober 1, 2026–September 30, 2027
SourceCMS ICD-10-CM order file
ClassificationDiagnosis · clinical modification

Related entries

Up to 30 descendants in this category

CODEDESCRIPTIONTYPE
S04.0Injury of optic nerve and pathwaysCategory
S04.01Injury of optic nerveCategory
S04.011Injury of optic nerve, right eyeCategory
S04.011AInjury of optic nerve, right eye, initial encounterBillable
S04.011DInjury of optic nerve, right eye, subsequent encounterBillable
S04.011SInjury of optic nerve, right eye, sequelaBillable
S04.012Injury of optic nerve, left eyeCategory
S04.012AInjury of optic nerve, left eye, initial encounterBillable
S04.012DInjury of optic nerve, left eye, subsequent encounterBillable
S04.012SInjury of optic nerve, left eye, sequelaBillable
S04.019Injury of optic nerve, unspecified eyeCategory
S04.019AInjury of optic nerve, unspecified eye, initial encounterBillable
S04.019DInjury of optic nerve, unspecified eye, subsequent encounterBillable
S04.019SInjury of optic nerve, unspecified eye, sequelaBillable
S04.02Injury of optic chiasmCategory
S04.02XAInjury of optic chiasm, initial encounterBillable
S04.02XDInjury of optic chiasm, subsequent encounterBillable
S04.02XSInjury of optic chiasm, sequelaBillable
S04.03Injury of optic tract and pathwaysCategory
S04.031Injury of optic tract and pathways, right sideCategory
S04.031AInjury of optic tract and pathways, right side, initial encounterBillable
S04.031DInjury of optic tract and pathways, right side, subsequent encounterBillable
S04.031SInjury of optic tract and pathways, right side, sequelaBillable
S04.032Injury of optic tract and pathways, left sideCategory
S04.032AInjury of optic tract and pathways, left side, initial encounterBillable
S04.032DInjury of optic tract and pathways, left side, subsequent encounterBillable
S04.032SInjury of optic tract and pathways, left side, sequelaBillable
S04.039Injury of optic tract and pathways, unspecified sideCategory
S04.039AInjury of optic tract and pathways, unspecified side, initial encounterBillable
S04.039DInjury of optic tract and pathways, unspecified side, subsequent encounterBillable

Use the complete reference

This reference does not reproduce the full tabular hierarchy, inclusion notes, Excludes1/2 notes, sequencing instructions, or seventh-character rules. Review the official tables and coding guidelines.

Open official CMS files

ICD-10-CM codes describe diagnoses. They do not have an independent Medicare PFS reimbursement amount, and billability alone does not establish coverage.