Is S02.101B a billable ICD-10-CM code?

Yes. S02.101B is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does S02.101B 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).

S02.101B

S02.101B — Fracture of base of skull, right side, initial encounter for open fracture

Billable / specific codeICD-10-CMright

S02.101B is a billable, specific ICD-10-CM code for fracture of base of skull, right side, initial encounter for open fracture. It is valid for submission on a claim.

7th character "B" — initial encounter for open fracture

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

Excludes2 inherited from the categories above S02.101B

Also inherited, and the opposite of Excludes1: these conditions are not part of S02.101B, but a patient can have both, so you may code both.

Written on S02.1 — Fracture of base of skull

lateral orbital wall (S02.84-)
medial orbital wall (S02.83-)
orbital floor (S02.3-)

Other codes that can never be billed with S02.101B

These codes carry an Excludes1 note pointing at S02.101B. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading S02.101B alone.

S01Open wound of head

Risk adjustment

S02.101B risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

HCC 399 Major Head Injury without Loss of Consciousness0.199 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.

Medicare coverage

S02.101B is named in 6 Medicare coverage policies — 6 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A54767Billing and Coding: Medicare Preventive Coverage for Certain Vaccines
A56612Billing and Coding: CT of the Head
A56900Billing and Coding: Immunizations
A57204Billing and Coding: MRI and CT Scans of the Head and Neck

Code history

S02.101B 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 S02.101. If S02.101B is not quite right, the correct code is usually one of these.

Questions about S02.101B

Is S02.101B a billable ICD-10-CM code?: Yes. S02.101B is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does S02.101B 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).