DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

S13 Dislocation and sprain of joints and ligaments at neck level

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

S13 is not billable. The category heads 75 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

  • Whiplash injury → S13.4
  • Syndromewhiplash → S13.4
  • Dislocation (articular)neck → S13.20

Where it sits

  1. Chapter 19 Injury, poisoning and certain other consequences of external causes (S00-T88)
  2. S10-S19 Injuries to the neck (S10-S19)
  3. S13 Dislocation and sprain of joints and ligaments at neck level
Billable codes
75
Subdivisions
7
CC / MCC codes
21 / 0
HCC V28 codes
0
New FY2027
0
Index entries
57

Codes in S13

  1. S13.0
    Traumatic rupture of cervical intervertebral disc +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
    Excludes1 1

    Excludes1

    • rupture or displacement (nontraumatic) of cervical intervertebral disc NOS (M50.-) M50
  2. S13.1
    Subluxation and dislocation of cervical vertebrae
    Header
    Excludes2 1, Code also 3

    Excludes2

    • fracture of cervical vertebrae (S12.0-S12.3-) S12.0 S12.3

    Code also

    • any associated:
    • open wound of neck (S11.-) S11
    • spinal cord injury (S14.1-) S14.1
  3. S13.10
    Subluxation and dislocation of unspecified cervical vertebrae
    Header
  4. S13.100
    Subluxation of unspecified cervical vertebrae +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  5. S13.101
    Dislocation of unspecified cervical vertebrae +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  6. S13.11
    Subluxation and dislocation of C0/C1 cervical vertebrae
    Header
    Inclusion terms 3

    Inclusion terms

    • Subluxation and dislocation of atlantooccipital joint
    • Subluxation and dislocation of atloidooccipital joint
    • Subluxation and dislocation of occipitoatloid joint
  7. S13.110
    Subluxation of C0/C1 cervical vertebrae +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  8. S13.111
    Dislocation of C0/C1 cervical vertebrae +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  9. S13.12
    Subluxation and dislocation of C1/C2 cervical vertebrae
    Header
    Inclusion terms 1

    Inclusion terms

    • Subluxation and dislocation of atlantoaxial joint
  10. S13.120
    Subluxation of C1/C2 cervical vertebrae +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  11. S13.121
    Dislocation of C1/C2 cervical vertebrae +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  12. S13.13
    Subluxation and dislocation of C2/C3 cervical vertebrae
    Header
  13. S13.130
    Subluxation of C2/C3 cervical vertebrae +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  14. S13.131
    Dislocation of C2/C3 cervical vertebrae +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  15. S13.14
    Subluxation and dislocation of C3/C4 cervical vertebrae
    Header
  16. S13.140
    Subluxation of C3/C4 cervical vertebrae +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  17. S13.141
    Dislocation of C3/C4 cervical vertebrae +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  18. S13.15
    Subluxation and dislocation of C4/C5 cervical vertebrae
    Header
  19. S13.150
    Subluxation of C4/C5 cervical vertebrae +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  20. S13.151
    Dislocation of C4/C5 cervical vertebrae +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  21. S13.16
    Subluxation and dislocation of C5/C6 cervical vertebrae
    Header
  22. S13.160
    Subluxation of C5/C6 cervical vertebrae +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  23. S13.161
    Dislocation of C5/C6 cervical vertebrae +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  24. S13.17
    Subluxation and dislocation of C6/C7 cervical vertebrae
    Header
  25. S13.170
    Subluxation of C6/C7 cervical vertebrae +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  26. S13.171
    Dislocation of C6/C7 cervical vertebrae +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  27. S13.18
    Subluxation and dislocation of C7/T1 cervical vertebrae
    Header
  28. S13.180
    Subluxation of C7/T1 cervical vertebrae +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  29. S13.181
    Dislocation of C7/T1 cervical vertebrae +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  30. S13.2
    Dislocation of other and unspecified parts of neck
    Header
  31. S13.20
    Dislocation of unspecified parts of neck +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  32. S13.29
    Dislocation of other parts of neck +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  33. S13.4
    Sprain of ligaments of cervical spine +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 4

    Inclusion terms

    • Sprain of anterior longitudinal (ligament), cervical
    • Sprain of atlanto-axial (joints)
    • Sprain of atlanto-occipital (joints)
    • Whiplash injury of cervical spine
  34. S13.5
    Sprain of thyroid region +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 3

    Inclusion terms

    • Sprain of cricoarytenoid (joint) (ligament)
    • Sprain of cricothyroid (joint) (ligament)
    • Sprain of thyroid cartilage
  35. S13.8
    Sprain of joints and ligaments of other parts of neck +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  36. S13.9
    Sprain of joints and ligaments of unspecified parts of neck +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

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 S13

Includes

  • avulsion of joint or ligament at neck level
  • laceration of cartilage, joint or ligament at neck level
  • sprain of cartilage, joint or ligament at neck level
  • traumatic hemarthrosis of joint or ligament at neck level
  • traumatic rupture of joint or ligament at neck level
  • traumatic subluxation of joint or ligament at neck level
  • traumatic tear of joint or ligament at neck level

Excludes2

  • strain of muscle or tendon at neck level (S16.1) S16.1

Code also

  • any associated open wound

Notes that also apply

Block S10-S19 instructions (Includes 3, Excludes2 7): 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 S13 defined here

The appropriate 7th character is to be added to each code from category S13

7th characters for S13
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

  • Whiplash injury → S13.4
  • Dislocation (articular)atlantooccipital → S13.111
  • Dislocation (articular)atloidooccipital → S13.111
  • Dislocation (articular)occipitoatloid → S13.111
  • Dislocation (articular)atlantoaxial → S13.121
  • Dislocation (articular)neck → S13.20
  • Dislocation (articular)cricoarytenoid articulation → S13.29
  • Dislocation (articular)cricothyroid articulation → S13.29
  • Dislocation (articular)thyroid cartilage → S13.29
  • Injurywhiplash (cervical spine) → S13.4
  • Sprain (joint) (ligament)anterior longitudinal, cervical → S13.4
  • Sprain (joint) (ligament)atlas, atlanto-axial, atlanto-occipital → S13.4
  • Sprain (joint) (ligament)cervical, cervicodorsal, cervicothoracic → S13.4
  • Syndromewhiplash → S13.4
  • Torticollis (intermittent) (spastic)traumatic, current → S13.4
  • Sprain (joint) (ligament)cricoarytenoid articulation or ligament → S13.5
  • Sprain (joint) (ligament)cricothyroid articulation → S13.5
  • Sprain (joint) (ligament)thyroid cartilage or region → S13.5
  • Sprain (joint) (ligament)neck → S13.9
  • Dislocation (articular)vertebra (articular process) (body) (traumatic)cervical → S13.101
  • Dislocation (articular)neckspecified site NEC → S13.29
  • Sprain (joint) (ligament)neckanterior longitudinal cervical ligament → S13.4
  • Sprain (joint) (ligament)neckatlanto-axial joint → S13.4
  • Sprain (joint) (ligament)neckatlanto-occipital joint → S13.4
  • Sprain (joint) (ligament)neckcervical spine → S13.4
  • Sprain (joint) (ligament)spinecervical → S13.4
  • Sprain (joint) (ligament)cartilagethyroid region → S13.5
  • Sprain (joint) (ligament)neckcricoarytenoid ligament → S13.5
  • Sprain (joint) (ligament)neckcricothyroid ligament → S13.5
  • Sprain (joint) (ligament)neckthyroid region (cartilage) → S13.5
  • Sprain (joint) (ligament)neckspecified site NEC → S13.8
  • Rupture, rupturedtraumaticintervertebral disccervical → S13.0
  • Subluxationvertebraltraumaticcervical → S13.100
  • Dislocation (articular)vertebra (articular process) (body) (traumatic)cervicalatlantooccipital joint → S13.111
  • Dislocation (articular)vertebra (articular process) (body) (traumatic)cervicalatloidooccipital joint → S13.111
  • Dislocation (articular)vertebra (articular process) (body) (traumatic)cervicaloccipitoatloid joint → S13.111
  • Dislocation (articular)vertebra (articular process) (body) (traumatic)cervicalatlantoaxial joint → S13.121
  • Subluxationvertebraltraumaticcervicalatlantooccipital joint → S13.110
  • Subluxationvertebraltraumaticcervicalatloidooccipital joint → S13.110
  • Subluxationvertebraltraumaticcervicaloccipitoatloid joint → S13.110

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

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