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ICD-10-CM 2027 diagnosis code

S83.00Unspecified subluxation and dislocation of patella

Not billable — use a more specific codeRequires 7th character

S83.00 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.

Looking up by condition? See ICD-10 code for Patella subluxation.

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 S83.00

S83.00 is the ICD-10-CM diagnosis code for unspecified subluxation and dislocation of patella. 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 S83.0, choose S83.00 (Unspecified subluxation and dislocation of patella) only when documentation doesn't support a more specific option: lateral subluxation and dislocation of patella (S83.01) and other subluxation and dislocation of patella (S83.09).

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 S83.00.

› 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

1 entries

Terms in the official ICD-10-CM index that lead to S83.00.

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 S83.00

Is S83.00 billable?

No. S83.00 is a header code. Report one of its more specific subcodes instead.