S13.11 – Subluxation and dislocation of C0/C1 cervical vertebrae

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

Non-billable header

ICD-10-CM code S13.11

Code: S13.11 (claims format: S1311)
Description: Subluxation and dislocation of C0/C1 cervical vertebrae
Billable: No – use a more specific code below
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

Billable codes under S13.11

S13.11 is a header code and cannot be used on claims. Choose the most specific code:

S13.110 – Subluxation of C0/C1 cervical vertebraeHeader (more codes below)
S13.111 – Dislocation of C0/C1 cervical vertebraeHeader (more codes below)

7th character values

Codes in this category need a 7th character to describe the encounter or episode of care (use placeholder X for empty positions).

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

Notes for S13.11

Applicable to:

Subluxation and dislocation of atlantooccipital joint
Subluxation and dislocation of atloidooccipital joint
Subluxation and dislocation of occipitoatloid joint

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 S13.1

Frequently asked questions

What is ICD-10 code S13.11?

S13.11 is the ICD-10-CM code for subluxation and dislocation of C0/C1 cervical vertebrae, in the block S10-S19 (Injuries to the neck).

Is S13.11 a billable code?

No. S13.11 is a header code with more specific child codes; report one of the billable codes listed above.

What category does S13.11 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.