S04.81 ICD-10-CM Code: Injury of olfactory [1st ] nerve
Billing Status: NO. This is a clinician non-billable / parent hierarchy grouping in the ICD-10-CM system.
Code Set: Valid FY2026 and FY2027. FY2026 took effect October 1, 2025.
Official Registry Overview & Definition
Official Tabular Instructional Notes
Sequencing, inclusion, and exclusion notes published for S04.81 in the official ICD-10-CM tabular list.
Includes
Conditions the official ICD-10-CM tabular list includes under this code.
- injuries of ear
- injuries of eye
- injuries of face [any part]
- injuries of gum
- injuries of jaw
- injuries of oral cavity
- injuries of palate
- injuries of periocular area
- injuries of scalp
- injuries of temporomandibular joint area
- injuries of tongue
- injuries of tooth
Excludes2 — Not Included Here
Conditions not covered by this code, but which may be reported alongside it when both are present.
- burns and corrosions (T20-T32)
- effects of foreign body in ear (T16)
- effects of foreign body in larynx (T17.3)
- effects of foreign body in mouth NOS (T18.0)
- effects of foreign body in nose (T17.0-T17.1)
- effects of foreign body in pharynx (T17.2)
- effects of foreign body on external eye (T15.-)
- frostbite (T33-T34)
- insect bite or sting, venomous (T63.4)
Code First
Underlying conditions that must be sequenced before this code.
- any associated intracranial injury (S06.-)
Code Also
Additional codes that may be required to fully describe the encounter.
- any associated:
- open wound of head (S01.-)
- skull fracture (S02.-)
- for any associated infection
Frequently Asked Questions (FAQ) & Clinical Guidance
Can S04.81 be billed directly?
No. S04.81 (Injury of olfactory [1st ] nerve) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.
Does S04.81 require a 7th character?
Yes. The appropriate 7th character is to be added to each code from category S04.
Nearest Codes in This Family
Official ICD-10-CM classifications closest to S04.81 in its code family, with their registry titles.
- S04.72 — Injury of accessory nerve, left side
- S04.72XA — Injury of accessory nerve, left side, initial encounter
- S04.72XD — Injury of accessory nerve, left side, subsequent encounter
- S04.72XS — Injury of accessory nerve, left side, sequela
- S04.8 — Injury of other cranial nerves
- 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