S04.019A Injury of optic nerve, unspecified eye, initial encounter

Billable ICD-10-CM code, FY2026.

Built from S04.019 with 7th character A (initial encounter).

Applies from S04 Injury of cranial nerve

Applicable to

• The selection of side should be based on the side of the body being affected

Code first

• any associated intracranial injury (S06.-)

Code also

• any associated:
• open wound of head (S01.-)
• skull fracture (S02.-)

7th character note

• The appropriate 7th character is to be added to each code from category S04

7th character required

• A — initial encounter
• D — subsequent encounter
• S — sequela

Applies from S04.0 Injury of optic nerve and pathways

Use additional code

• code to identify any visual field defect or blindness (H53.4-, H54.-)

Applies from S04.01 Injury of optic nerve

Applicable to

• Injury of 2nd cranial nerve

Applies from S04.019 Injury of optic nerve, unspecified eye

Applicable to

• Injury of optic nerve NOS

Medicare Code Edits (MCE v43.1 (April 2026))

• Unspecified code (laterality): Unspecified codes for which a more specific code identifying laterality (right, left, bilateral) exists within the same code family.

Code annotations containing back-references to S04.019A

Back-references to S04.0

• Type 2 Excludes: S05 Injury of eye and orbit ("2nd cranial [optic] nerve injury (S04.0-)")

Back-references to S04

• Code Also: G96.00 Cerebrospinal fluid leak, unspecified ("head injury (S00-S09)")
• Code Also: G96.08 Other cranial cerebrospinal fluid leak ("head injury (S00 - S09)")
• Code Also: G96.09 Other spinal cerebrospinal fluid leak ("head injury (S00 - S09)")
• Code Also: S01 Open wound of head ("injury of cranial nerve (S04.-)")

Nearby codes

• S04.012 Injury of optic nerve, left eye
• S04.012A Injury of optic nerve, left eye, initial encounter
• S04.012D Injury of optic nerve, left eye, subsequent encounter
• S04.012S Injury of optic nerve, left eye, sequela
• S04.019 Injury of optic nerve, unspecified eye
• S04.019A Injury of optic nerve, unspecified eye, initial encounter (this code)
• S04.019D Injury of optic nerve, unspecified eye, subsequent encounter
• S04.019S Injury of optic nerve, unspecified eye, sequela
• S04.02 Injury of optic chiasm
• S04.02XA Injury of optic chiasm, initial encounter
• S04.02XD Injury of optic chiasm, subsequent encounter