S13.181A – Dislocation of C7/T1 cervical vertebrae, initial encounter

ICD-10-CM 2027 diagnosis code · Injuries to the neck

Billable code

ICD-10-CM code S13.181A

Code: S13.181A (claims format: S13181A)
Description: Dislocation of C7/T1 cervical vertebrae, initial encounter
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 19. Injury, poisoning and certain other consequences of external causes (S00-T88)
Block: S10-S19 Injuries to the neck
Parent codes: S13 › S13.1 › S13.18 › S13.181

7th character values

Codes in this category need a 7th character to describe the encounter or episode of care.

Character	Meaning
`A`	initial encounter
`D`	subsequent encounter
`S`	sequela

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

S13 – Dislocation and sprain of joints and ligaments at neck level

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 (not included here):

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

Code also:

any associated open wound

7th character note:

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

S13.1 – Subluxation and dislocation of cervical vertebrae

Excludes2 (not included here):

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

Code also:

any associated:
open wound of neck (S11.-)
spinal cord injury (S14.1-)

Block S10-S19

Includes:

injuries of nape
injuries of supraclavicular region
injuries of throat

Excludes2 (not included here):

burns and corrosions (T20-T32)
effects of foreign body in esophagus (T18.1)
effects of foreign body in larynx (T17.3)
effects of foreign body in pharynx (T17.2)
effects of foreign body in trachea (T17.4)
frostbite (T33-T34)
insect bite or sting, venomous (T63.4)

Related codes in S13.181

Frequently asked questions

What is ICD-10 code S13.181A?

S13.181A is the ICD-10-CM code for dislocation of C7/T1 cervical vertebrae, initial encounter, in the block S10-S19 (Injuries to the neck).

Is S13.181A a billable code?

Yes. S13.181A is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does S13.181A belong to?

It belongs to category S13 – Dislocation and sprain of joints and ligaments at neck level.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.