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ICD-10-CM 2027 diagnosis code

S83.13Medial subluxation and dislocation of proximal end of tibia

Not billable — use a more specific codeRequires 7th character

S83.13 is a header code, so it can't be reported by itself. Choose one of the 6 more specific codes beneath it and add the required 7th character.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About S83.13

S83.13 is the ICD-10-CM diagnosis code for medial 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), S83.13 is specifically for medial 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), posterior subluxation and dislocation of proximal end of tibia (S83.12), 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.

7th character

The appropriate 7th character is to be added to each code from category S83

  • Ainitial encounter
  • Dsubsequent encounter
  • Ssequela

Notes that apply from higher levels

Instructions written at a parent level also apply to S83.13.

› From S83.1 Subluxation and dislocation of knee
Excludes2
› From S83 Dislocation and sprain of joints and ligaments of knee
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
Excludes2
  • 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.-)
Code also
  • any associated open wound

Broader instructions also apply from S80-S89 Injuries to the knee and lower leg and Chapter 19: Injury, poisoning and certain other consequences of external causes.

Alphabetic index entries

2 entries

Terms in the official ICD-10-CM index that lead to S83.13.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about S83.13

Is S83.13 billable?

No. S83.13 is a header code. Report one of its more specific subcodes instead.