S83.00
Unspecified subluxation and dislocation of patella
Not billable — category only FY2026 2025-10-01 → 2026-09-30
This is the unspecified option. 2 more
specific codes sit alongside it. Worth
checking whether the documentation supports one of them.
Exclusions 13 never code together
S83code
Excludes2
- derangement of patella (M22.0-M22.3)M22.0-M22.3
- injury of patellar ligament (tendon) (S76.1-)S76.1-
- internal derangement of knee (M23.-)M23.-
- old dislocation of knee (M24.36)M24.36
- pathological dislocation of knee (M24.36)M24.36
- recurrent dislocation of knee (M22.0)M22.0
- strain of muscle, fascia and tendon of lower leg (S86.-)S86.-
S80-S89block
Excludes2 — not included here, but the patient may have both. Code both when documented.
7th character 3
A initial encounter
D subsequent encounter
S sequela
Instructional notes 11
S83code
Includes
- 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
Code also
- any associated open wound
S00-T88chapter
Notes
- 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
- 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.
Use additional code
- code to identify any retained foreign body, if applicable (Z18.-)Z18.-
Index entries leading here 1
- Subluxation — see also Dislocation
- patella S83.00
Alongside this code 2 same parent — S83.0
Subordinate codes 6
S83.001 Unspecified subluxation of right patella S83.002 Unspecified subluxation of left patella S83.003 Unspecified subluxation of unspecified patella S83.004 Unspecified dislocation of right patella S83.005 Unspecified dislocation of left patella S83.006 Unspecified dislocation of unspecified patella
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.