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ICD-10-CM 2027 diagnosis code

S43.021Posterior subluxation of right humerus

Not billable — use a more specific codeRequires 7th character

S43.021 is a header code, so it can't be reported by itself. Choose one of the 3 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 S43.021

S43.021 is the ICD-10-CM diagnosis code for posterior subluxation of right humerus. It belongs to category S43 (dislocation and sprain of joints and ligaments of shoulder girdle), block S40-S49 (injuries to the shoulder and upper arm) 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 3 subcodes must be used instead.

Within S43.02 (posterior subluxation and dislocation of humerus), S43.021 is specifically for posterior subluxation of right humerus. Related codes cover subluxation of left humerus (S43.022), subluxation of unspecified humerus (S43.023), dislocation of right humerus (S43.024), dislocation of left humerus (S43.025) and dislocation of unspecified humerus (S43.026).

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 S43

Notes that apply from higher levels

Instructions written at a parent level also apply to S43.021.

› From S43 Dislocation and sprain of joints and ligaments of shoulder girdle
Includes
  • avulsion of joint or ligament of shoulder girdle
  • laceration of cartilage, joint or ligament of shoulder girdle
  • sprain of cartilage, joint or ligament of shoulder girdle
  • traumatic hemarthrosis of joint or ligament of shoulder girdle
  • traumatic rupture of joint or ligament of shoulder girdle
  • traumatic subluxation of joint or ligament of shoulder girdle
  • traumatic tear of joint or ligament of shoulder girdle
Excludes2
  • strain of muscle, fascia and tendon of shoulder and upper arm (S46.-)
Code also
  • any associated open wound

Broader instructions also apply from S40-S49 Injuries to the shoulder and upper arm and Chapter 19: Injury, poisoning and certain other consequences of external causes.

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 S43.021

Is S43.021 billable?

No. S43.021 is a header code. Report one of its more specific subcodes instead.