Medial subluxation of proximal end of tibia, unspecified knee, initial encounter
Billable / specific
S83.133A is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.
Inclusion terms
Includes (from S83)
- avulsion of joint or ligament of knee
- laceration of cartilage, joint or ligament of knee
- sprain of cartilage, joint or ligament of knee
- traumatic hemarthrosis of joint or ligament of knee
- traumatic rupture of joint or ligament of knee
- traumatic subluxation of joint or ligament of knee
- traumatic tear of joint or ligament of knee
- Note: Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
- Note: The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.
Excludes2
Not included here — may be reported together when both conditions exist.
- instability of knee prosthesis (T84.022, T84.023) (from S83.1)
- birth trauma (P10-P15) (from S83)
- obstetric trauma (O70-O71) (from S83)
- burns and corrosions (T20-T32) (from S83)
- frostbite (T33-T34) (from S83)
- injuries of ankle and foot, except fracture of ankle and malleolus (S90-S99) (from S83)
- insect bite or sting, venomous (T63.4) (from S83)
- derangement of patella (M22.0-M22.3) (from S83)
- injury of patellar ligament (tendon) (S76.1-) (from S83)
- internal derangement of knee (M23.-) (from S83)
- old dislocation of knee (M24.36) (from S83)
- pathological dislocation of knee (M24.36) (from S83)
- recurrent dislocation of knee (M22.0) (from S83)
- strain of muscle, fascia and tendon of lower leg (S86.-) (from S83)
Use additional code
Add a code to identify the following, if applicable.
Code also
An additional code may be needed.
- any associated open wound (from S83)
7th character
The 7th character values that apply to this code (defined at S83). Use the placeholder "X" for missing positions.
| Character | Meaning |
|---|---|
| A | initial encounter |
| D | subsequent encounter |
| S | sequela |
Parent code
- S83.133Medial subluxation of proximal end of tibia, unspecified kneeNeeds 7th char