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ICD-10-CM 2027 diagnosis code

S23.10Subluxation and dislocation of unspecified thoracic vertebra

Not billable — use a more specific codeRequires 7th character

S23.10 is a header code, so it can't be reported by itself. Choose one of the 2 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 S23.10

S23.10 is the ICD-10-CM diagnosis code for subluxation and dislocation of unspecified thoracic vertebra. It belongs to category S23 (dislocation and sprain of joints and ligaments of thorax), block S20-S29 (injuries to the thorax) 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 2 subcodes must be used instead.

Within S23.1, choose S23.10 (unspecified thoracic vertebra) only when documentation doesn't support a more specific option: T1/T2 thoracic vertebra (S23.11), T2/T3-T3/T4 thoracic vertebra (S23.12), T4/T5-T5/T6 thoracic vertebra (S23.13), T6/T7-T7/T8 thoracic vertebra (S23.14), T8/T9-T9/T10 thoracic vertebra (S23.15), T10/T11-T11/T12 thoracic vertebra (S23.16) and T12/L1 thoracic vertebra (S23.17).

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 S23

  • Ainitial encounter
  • Dsubsequent encounter
  • Ssequela

Notes that apply from higher levels

Instructions written at a parent level also apply to S23.10.

› From S23.1 Subluxation and dislocation of thoracic vertebra
Excludes2
  • fracture of thoracic vertebrae (S22.0-)
Code also
  • any associated:
  • open wound of thorax (S21.-)
  • spinal cord injury (S24.0-, S24.1-)
› From S23 Dislocation and sprain of joints and ligaments of thorax
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)
  • strain of muscle or tendon of thorax (S29.01-)
Code also
  • any associated open wound

Broader instructions also apply from S20-S29 Injuries to the thorax 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 S23.10

Is S23.10 billable?

No. S23.10 is a header code. Report one of its more specific subcodes instead.