ICD-10-CM 2027
ICD-10 code for lower back injury
From the official ICD-10-CM alphabetic index entry “Injury › lower back”. Page updated September 29, 2026.
About coding lower back injury
The ICD-10-CM code for lower back injury is S39.92 (Unspecified injury of lower back). The official index lists 1 more specific code, so check the documentation for details such as type, cause, site or severity before settling on S39.92.
Within S39.9 (unspecified injury of abdomen, lower back, pelvis and external genitals), S39.92 is specifically for unspecified injury of lower back. Related codes cover abdomen (S39.91), pelvis (S39.93) and external genitals (S39.94).
Codes in this range require a 7th character: A for initial encounter, D for subsequent encounter and S for sequela. Use placeholder "X" characters to fill any empty positions before the 7th character.
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
More specific lower back injury codes (official index)
- specified NEC S39.82 — Other specified injuries of lower back
Common questions about lower back injury ICD-10 codes
What is the ICD-10 code for lower back injury?
- S39.92 — Unspecified injury of lower back (a header code; report a more specific subcode). More specific codes apply when the documentation supports them: S39.82.
Is S39.92 billable?
- No. S39.92 is a header code. Report one of its more specific subcodes instead.