DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

S23 Dislocation and sprain of joints and ligaments of thorax

  • Header · not billable
  • Codes take a 7th character

S23 is not billable. The category heads 108 billable codes in FY2027, grouped under 7 subdivisions. Its codes take a 7th character, so none is complete with fewer than 7 characters.

Index → code

  • Dislocation (articular)thorax → S23.20
  • Dislocation (articular)sternum → S23.29
  • Dislocation (articular)trachea → S23.29

Where it sits

  1. Chapter 19 Injury, poisoning and certain other consequences of external causes (S00-T88)
  2. S20-S29 Injuries to the thorax (S20-S29)
  3. S23 Dislocation and sprain of joints and ligaments of thorax
Billable codes
108
Subdivisions
7
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
50

Codes in S23

  1. S23.0
    Traumatic rupture of thoracic intervertebral disc +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Excludes1 1

    Excludes1

    • rupture or displacement (nontraumatic) of thoracic intervertebral disc NOS (M51.- with fifth character 4) M51
  2. S23.1
    Subluxation and dislocation of thoracic vertebra
    Header
    Excludes2 1, Code also 3

    Excludes2

    • fracture of thoracic vertebrae (S22.0-) S22.0

    Code also

    • any associated:
    • open wound of thorax (S21.-) S21
    • spinal cord injury (S24.0-, S24.1-) S24.0 S24.1
  3. S23.10
    Subluxation and dislocation of unspecified thoracic vertebra
    Header
  4. S23.100
    Subluxation of unspecified thoracic vertebra +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  5. S23.101
    Dislocation of unspecified thoracic vertebra +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  6. S23.11
    Subluxation and dislocation of T1/T2 thoracic vertebra
    Header
  7. S23.110
    Subluxation of T1/T2 thoracic vertebra +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  8. S23.111
    Dislocation of T1/T2 thoracic vertebra +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  9. S23.12
    Subluxation and dislocation of T2/T3-T3/T4 thoracic vertebra
    Header
  10. S23.120
    Subluxation of T2/T3 thoracic vertebra +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  11. S23.121
    Dislocation of T2/T3 thoracic vertebra +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  12. S23.122
    Subluxation of T3/T4 thoracic vertebra +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  13. S23.123
    Dislocation of T3/T4 thoracic vertebra +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  14. S23.13
    Subluxation and dislocation of T4/T5-T5/T6 thoracic vertebra
    Header
  15. S23.130
    Subluxation of T4/T5 thoracic vertebra +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  16. S23.131
    Dislocation of T4/T5 thoracic vertebra +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  17. S23.132
    Subluxation of T5/T6 thoracic vertebra +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  18. S23.133
    Dislocation of T5/T6 thoracic vertebra +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  19. S23.14
    Subluxation and dislocation of T6/T7-T7/T8 thoracic vertebra
    Header
  20. S23.140
    Subluxation of T6/T7 thoracic vertebra +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  21. S23.141
    Dislocation of T6/T7 thoracic vertebra +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  22. S23.142
    Subluxation of T7/T8 thoracic vertebra +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  23. S23.143
    Dislocation of T7/T8 thoracic vertebra +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  24. S23.15
    Subluxation and dislocation of T8/T9-T9/T10 thoracic vertebra
    Header
  25. S23.150
    Subluxation of T8/T9 thoracic vertebra +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  26. S23.151
    Dislocation of T8/T9 thoracic vertebra +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  27. S23.152
    Subluxation of T9/T10 thoracic vertebra +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  28. S23.153
    Dislocation of T9/T10 thoracic vertebra +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  29. S23.16
    Subluxation and dislocation of T10/T11-T11/T12 thoracic vertebra
    Header
  30. S23.160
    Subluxation of T10/T11 thoracic vertebra +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  31. S23.161
    Dislocation of T10/T11 thoracic vertebra +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  32. S23.162
    Subluxation of T11/T12 thoracic vertebra +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  33. S23.163
    Dislocation of T11/T12 thoracic vertebra +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  34. S23.17
    Subluxation and dislocation of T12/L1 thoracic vertebra
    Header
  35. S23.170
    Subluxation of T12/L1 thoracic vertebra +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  36. S23.171
    Dislocation of T12/L1 thoracic vertebra +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  37. S23.2
    Dislocation of other and unspecified parts of thorax
    Header
  38. S23.20
    Dislocation of unspecified part of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  39. S23.29
    Dislocation of other parts of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  40. S23.3
    Sprain of ligaments of thoracic spine +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  41. S23.4
    Sprain of ribs and sternum
    Header
  42. S23.41
    Sprain of ribs +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  43. S23.42
    Sprain of sternum
    Header
  44. S23.421
    Sprain of chondrosternal joint +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  45. S23.428
    Other sprain of sternum +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  46. S23.429
    Unspecified sprain of sternum +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  47. S23.8
    Sprain of other specified parts of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  48. S23.9
    Sprain of unspecified parts of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters

Sources of each column. Rows marked +7th need a 7th character: pick one to build the full code; its code card has its own flags.

Instructions

At S23

Includes

  • avulsion of joint or ligament of thorax
  • laceration of cartilage, joint or ligament of thorax
  • sprain of cartilage, joint or ligament of thorax
  • traumatic hemarthrosis of joint or ligament of thorax
  • traumatic rupture of joint or ligament of thorax
  • traumatic subluxation of joint or ligament of thorax
  • traumatic tear of joint or ligament of thorax

Excludes2

  • dislocation, sprain of sternoclavicular joint (S43.2, S43.6) S43.2 S43.6
  • strain of muscle or tendon of thorax (S29.01-) S29.01

Code also

  • any associated open wound

Notes that also apply

Block S20-S29 instructions (Includes 3, Excludes2 11): printed on the block page.

Chapter 19 instructions (Notes 2, Excludes2 2, Use additional code 1): printed on the chapter 19 page.

7th characters

7th characters for S23 defined here

The appropriate 7th character is to be added to each code from category S23

7th characters for S23
7thMeaning (NCHS)
Ainitial encounter
Dsubsequent encounter
Ssequela

A code that takes a 7th character is invalid without it; the placeholder X fills a code shorter than 6 characters (Official Guidelines I.A.5). How 7th characters work.

Index entries

  • Dislocation (articular)thorax → S23.20
  • Dislocation (articular)breast bone → S23.29
  • Dislocation (articular)costal cartilage → S23.29
  • Dislocation (articular)costochondral → S23.29
  • Dislocation (articular)rib (cartilage) → S23.29
  • Dislocation (articular)sternum → S23.29
  • Dislocation (articular)trachea → S23.29
  • Dislocation (articular)xiphoid cartilage → S23.29
  • Sprain (joint) (ligament)dorsal (spine) → S23.3
  • Fracture, traumatic (abduction) (adduction) (separation)costochondral cartilage → S23.41
  • Sprain (joint) (ligament)costal cartilage → S23.41
  • Sprain (joint) (ligament)rib (cage) → S23.41
  • Sprain (joint) (ligament)chondrosternal → S23.421
  • Sprain (joint) (ligament)sternum → S23.429
  • Sprain (joint) (ligament)thorax → S23.9
  • Dislocation (articular)vertebra (articular process) (body) (traumatic)thoracic → S23.101
  • Dislocation (articular)thoraxspecified site NEC → S23.29
  • Sprain (joint) (ligament)spinethoracic → S23.3
  • Sprain (joint) (ligament)thoraxspine → S23.3
  • Sprain (joint) (ligament)cartilagecostal → S23.41
  • Sprain (joint) (ligament)thoraxribs → S23.41
  • Sprain (joint) (ligament)sternumchondrosternal joint → S23.421
  • Sprain (joint) (ligament)sternumspecified site NEC → S23.428
  • Sprain (joint) (ligament)thoraxspecified site NEC → S23.8
  • Rupture, rupturedtraumaticintervertebral discthoracic → S23.0
  • Subluxationvertebraltraumaticthoracic → S23.100
  • Dislocation (articular)vertebra (articular process) (body) (traumatic)thoracicjoint betweenT1 and T2 → S23.111
  • Dislocation (articular)vertebra (articular process) (body) (traumatic)thoracicjoint betweenT2 and T3 → S23.121
  • Dislocation (articular)vertebra (articular process) (body) (traumatic)thoracicjoint betweenT3 and T4 → S23.123
  • Dislocation (articular)vertebra (articular process) (body) (traumatic)thoracicjoint betweenT4 and T5 → S23.131
  • Dislocation (articular)vertebra (articular process) (body) (traumatic)thoracicjoint betweenT5 and T6 → S23.133
  • Dislocation (articular)vertebra (articular process) (body) (traumatic)thoracicjoint betweenT6 and T7 → S23.141
  • Dislocation (articular)vertebra (articular process) (body) (traumatic)thoracicjoint betweenT7 and T8 → S23.143
  • Dislocation (articular)vertebra (articular process) (body) (traumatic)thoracicjoint betweenT8 and T9 → S23.151
  • Dislocation (articular)vertebra (articular process) (body) (traumatic)thoracicjoint betweenT9 and T10 → S23.153
  • Dislocation (articular)vertebra (articular process) (body) (traumatic)thoracicjoint betweenT10 and T11 → S23.161
  • Dislocation (articular)vertebra (articular process) (body) (traumatic)thoracicjoint betweenT11 and T12 → S23.163
  • Dislocation (articular)vertebra (articular process) (body) (traumatic)thoracicjoint betweenT12 and L1 → S23.171
  • Subluxationvertebraltraumaticthoracicjoint betweenT1 and T2 → S23.110
  • Subluxationvertebraltraumaticthoracicjoint betweenT2 and T3 → S23.120

10 more, longer entries are not listed; the search box finds them by word.

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy