S83.409

S83.409: Sprain of unspecified collateral ligament of unspecified knee

Non-billable headerICD-10-CMunspecified

S83.409 is a non-billable header ICD-10-CM code for sprain of unspecified collateral ligament of unspecified knee. 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 S83

A: initial encounter
D: subsequent encounter
S: sequela

Excludes2 inherited from the categories above S83.409

Not part of this code, but both may be coded when both are present.

Written on S83: Dislocation and sprain of joints and ligaments of knee

derangement of patella (M22.0-M22.3)
injury of patellar ligament (tendon) (S76.1-)
internal derangement of knee (M23.-)
old dislocation of knee (M24.36)
pathological dislocation of knee (M24.36)
recurrent dislocation of knee (M22.0)
strain of muscle, fascia and tendon of lower leg (S86.-)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead S83.409

3 child codes. Green means billable.