Is S13 a billable ICD-10-CM code?

No. S13 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does S13 sit in the tabular list?

Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the neck (S10-S19).

S13

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

Non-billable headerICD-10-CM

S13 is a non-billable header ICD-10-CM code for dislocation and sprain of joints and ligaments at neck level. It cannot be billed on its own: choose one of the more specific child codes below. This code also requires a 7th character before it is complete.

This code requires a 7th character

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

A: initial encounter
D: subsequent encounter
S: sequela

Excludes2 — not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

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

Code also

Both codes may be needed to describe the encounter fully. Sequencing depends on the reason for the visit.

any associated open wound

Includes

Conditions this code covers.

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

Other codes that can never be billed with S13

These codes carry an Excludes1 note pointing at S13. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading S13 alone.

G24.3Spasmodic torticollis

Risk adjustment

S13 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Code to one of these instead S13

7 child codes. Green means billable.

Questions about S13

Is S13 a billable ICD-10-CM code?: No. S13 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does S13 sit in the tabular list?: Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the neck (S10-S19).