Is S02.31XK a billable ICD-10-CM code?

Yes. S02.31XK is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does S02.31XK sit in the tabular list?

Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the head (S00-S09).

What cannot be coded together with S02.31XK?

S02.31XK 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 S02.31XK (S02.3) and apply to it just the same.

S02.31XK

S02.31XK — Fracture of orbital floor, right side, subsequent encounter for fracture with nonunion

Billable / specific codeICD-10-CMPOA exemptright

S02.31XK is a billable, specific ICD-10-CM code for fracture of orbital floor, right side, subsequent encounter for fracture with nonunion. It is valid for submission on a claim.

7th character "K" — subsequent encounter for fracture with nonunion

The appropriate 7th character is to be added to each code from category S02

A: initial encounter for closed fracture
B: initial encounter for open fracture
D: subsequent encounter for fracture with routine healing
G: subsequent encounter for fracture with delayed healing
K: subsequent encounter for fracture with nonunion
S: sequela

Excludes1 inherited from the categories above S02.31XK

These are not written on S02.31XK, but they bind it: a note on a category applies to every code beneath it. Billing S02.31XK with anything listed here is a denial.

Written on S02.3 — Fracture of orbital floor

orbit NOS (S02.85)

Excludes2 inherited from the categories above S02.31XK

Also inherited, and the opposite of Excludes1: these conditions are not part of S02.31XK, but a patient can have both, so you may code both.

Written on S02.3 — Fracture of orbital floor

lateral orbital wall (S02.84-)
medial orbital wall (S02.83-)
orbital roof (S02.1-)

Other codes that can never be billed with S02.31XK

These codes carry an Excludes1 note pointing at S02.31XK. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading S02.31XK alone.

S01Open wound of head

Risk adjustment

S02.31XK 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.

Medicare coverage

S02.31XK is named in 2 Medicare coverage policies — 2 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A56729Billing and Coding: Magnetic Resonance Imaging of the Head and Neck
A57204Billing and Coding: MRI and CT Scans of the Head and Neck

Code history

S02.31XK has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share S02.31. If S02.31XK is not quite right, the correct code is usually one of these.

Questions about S02.31XK

Is S02.31XK a billable ICD-10-CM code?: Yes. S02.31XK is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does S02.31XK sit in the tabular list?: Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the head (S00-S09).
What cannot be coded together with S02.31XK?: S02.31XK 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 S02.31XK (S02.3) and apply to it just the same.