S83.12Posterior subluxation and dislocation of proximal end of tibia

S83.12 is the ICD-10-CM diagnosis code for posterior subluxation and dislocation of proximal end of tibia. It belongs to category S83 (dislocation and sprain of joints and ligaments of knee), block S80-S89 (injuries to the knee and lower leg) and chapter 19 (injury, poisoning and certain other consequences of external causes). It is a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.

Within S83.1 (subluxation and dislocation of knee), S83.12 is specifically for posterior subluxation and dislocation of proximal end of tibia. Related codes cover unspecified subluxation and dislocation of knee (S83.10), anterior subluxation and dislocation of proximal end of tibia (S83.11), medial subluxation and dislocation of proximal end of tibia (S83.13), lateral subluxation and dislocation of proximal end of tibia (S83.14) and other subluxation and dislocation of knee (S83.19).

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.