S23.120A
✓ Billable
Subluxation of T2/T3 thoracic vertebra, initial encounter
ICD-10-CM · FY2026 · Injury, Poisoning and Certain Other Consequences of External Causes
Code
S23.120A
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Injury, Poisoning and Certain Other Consequences of External Causes
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code S23.120A?
ICD-10-CM code S23.120A represents Subluxation of T2/T3 thoracic vertebra, initial encounter. It is a billable diagnosis code in the Injury, Poisoning and Certain Other Consequences of External Causes chapter, effective October 1, 2025 – September 30, 2026.
Is S23.120A billable?
Yes. S23.120A is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is S23.120A in?
S23.120A belongs to the Injury, Poisoning and Certain Other Consequences of External Causes chapter (S00–T88) of ICD-10-CM.
Related codes in the S23 category
S23
Dislocation and sprain of joints and ligaments of thorax
Non-billable
S23.0
Traumatic rupture of thoracic intervertebral disc
Non-billable
S23.1
Subluxation and dislocation of thoracic vertebra
Non-billable
S23.2
Dislocation of other and unspecified parts of thorax
Non-billable
S23.3
Sprain of ligaments of thoracic spine
Non-billable
S23.4
Sprain of ribs and sternum
Non-billable
S23.8
Sprain of other specified parts of thorax
Non-billable
S23.9
Sprain of unspecified parts of thorax
Non-billable
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