Is S33.6 a billable ICD-10-CM code?

No. S33.6 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does S33.6 sit in the tabular list?

Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals (S30-S39).

What cannot be coded together with S33.6?

S33.6 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above S33.6 (S33) and apply to it just the same.

S33.6

S33.6 — Sprain of sacroiliac joint

Non-billable headerICD-10-CM

S33.6 is a non-billable header ICD-10-CM code for sprain of sacroiliac joint. 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 S33

A: initial encounter
D: subsequent encounter
S: sequela

Excludes1 inherited from the categories above S33.6

These are not written on S33.6, but they bind it: a note on a category applies to every code beneath it. Billing S33.6 with anything listed here is a denial.

Written on S33 — Dislocation and sprain of joints and ligaments of lumbar spine and pelvis

nontraumatic rupture or displacement of lumbar intervertebral disc NOS (M51.-)
obstetric damage to pelvic joints and ligaments (O71.6)

Excludes2 inherited from the categories above S33.6

Also inherited, and the opposite of Excludes1: these conditions are not part of S33.6, but a patient can have both, so you may code both.

Written on S33 — Dislocation and sprain of joints and ligaments of lumbar spine and pelvis

dislocation and sprain of joints and ligaments of hip (S73.-)
strain of muscle of lower back and pelvis (S39.01-)

Risk adjustment

S33.6 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.

How S33.6 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to S33.6.

Sprain›innominate›sacral junction
Sprain›sacroiliac›joint

Code history

S33.6 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Code to one of these instead S33.6

3 child codes. Green means billable.

Related codes at this level

Codes that share S33. If S33.6 is not quite right, the correct code is usually one of these.

Questions about S33.6

Is S33.6 a billable ICD-10-CM code?: No. S33.6 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does S33.6 sit in the tabular list?: Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals (S30-S39).
What cannot be coded together with S33.6?: S33.6 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above S33.6 (S33) and apply to it just the same.