S13.121
S13.121: Dislocation of C1/C2 cervical vertebrae
Non-billable headerICD-10-CM
S13.121 is a non-billable header ICD-10-CM code for dislocation of c1/c2 cervical vertebrae. It cannot be billed on its own: choose one of the more specific child codes below. This code also requires a 7th character before it is complete.
This code requires a 7th character
The appropriate 7th character is to be added to each code from category S13
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Excludes2 inherited from the categories above S13.121
Not part of this code, but both may be coded when both are present.
Written on S13.1: Subluxation and dislocation of cervical vertebrae
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Alphabetic index entries that lead here
- Dislocation›atlantoaxial
- Dislocation›vertebra›cervical›atlantoaxial joint
- Dislocation›vertebra›cervical›joint between›C1 and C2
Code history
Unchanged in every release from FY2024 to FY2027.
Code to one of these instead S13.121
3 child codes. Green means billable.