S04.812A Injury of olfactory [1st ] nerve, left side, initial encounter

Billable ICD-10-CM code, FY2026.

Built from S04.812 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

Code annotations containing back-references to S04.812A

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

• S04.811 Injury of olfactory [1st ] nerve, right side
• S04.811A Injury of olfactory [1st ] nerve, right side, initial encounter
• S04.811D Injury of olfactory [1st ] nerve, right side, subsequent encounter
• S04.811S Injury of olfactory [1st ] nerve, right side, sequela
• S04.812 Injury of olfactory [1st ] nerve, left side
• S04.812A Injury of olfactory [1st ] nerve, left side, initial encounter (this code)
• S04.812D Injury of olfactory [1st ] nerve, left side, subsequent encounter
• S04.812S Injury of olfactory [1st ] nerve, left side, sequela
• S04.819 Injury of olfactory [1st ] nerve, unspecified side
• S04.819A Injury of olfactory [1st ] nerve, unspecified side, initial encounter
• S04.819D Injury of olfactory [1st ] nerve, unspecified side, subsequent encounter