ICD-10-CM Codes
S00-T88 Injury, poisoning and certain other consequences of external causes
S80-S89 Injuries to the knee and lower leg
S83- Dislocation and sprain of joints and ligaments of knee

Sprain of collateral ligament of knee S83.4- >

S83.4 Sprain of collateral ligament of knee
- S83.40 Sprain of unspecified collateral ligament of knee
  - S83.401 Sprain of unspecified collateral ligament of right knee
    - S83.401A …… initial encounter
    - S83.401D …… subsequent encounter
    - S83.401S …… sequela
  - S83.402 Sprain of unspecified collateral ligament of left knee
    - S83.402A …… initial encounter
    - S83.402D …… subsequent encounter
    - S83.402S …… sequela
  - S83.409 Sprain of unspecified collateral ligament of unspecified knee
    - S83.409A …… initial encounter
    - S83.409D …… subsequent encounter
    - S83.409S …… sequela
- S83.41 Sprain of medial collateral ligament of knee
  - S83.411 Sprain of medial collateral ligament of right knee
    - S83.411A …… initial encounter
    - S83.411D …… subsequent encounter
    - S83.411S …… sequela
  - S83.412 Sprain of medial collateral ligament of left knee
    - S83.412A …… initial encounter
    - S83.412D …… subsequent encounter
    - S83.412S …… sequela
  - S83.419 Sprain of medial collateral ligament of unspecified knee
    - S83.419A …… initial encounter
    - S83.419D …… subsequent encounter
    - S83.419S …… sequela
- S83.42 Sprain of lateral collateral ligament of knee
  - S83.421 Sprain of lateral collateral ligament of right knee
    - S83.421A …… initial encounter
    - S83.421D …… subsequent encounter
    - S83.421S …… sequela
  - S83.422 Sprain of lateral collateral ligament of left knee
    - S83.422A …… initial encounter
    - S83.422D …… subsequent encounter
    - S83.422S …… sequela
  - S83.429 Sprain of lateral collateral ligament of unspecified knee
    - S83.429A …… initial encounter
    - S83.429D …… subsequent encounter
    - S83.429S …… sequela