Is S44.01 a billable ICD-10-CM code?

No. S44.01 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does S44.01 sit in the tabular list?

Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the shoulder and upper arm (S40-S49).

What cannot be coded together with S44.01?

S44.01 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 S44.01 (S44.0) and apply to it just the same.

S44.01

S44.01 — Injury of ulnar nerve at upper arm level, right arm

Non-billable headerICD-10-CMright

S44.01 is a non-billable header ICD-10-CM code for injury of ulnar nerve at upper arm level, right arm. 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 S44

A: initial encounter
D: subsequent encounter
S: sequela

Excludes1 inherited from the categories above S44.01

These are not written on S44.01, but they bind it: a note on a category applies to every code beneath it. Billing S44.01 with anything listed here is a denial.

Written on S44.0 — Injury of ulnar nerve at upper arm level

ulnar nerve NOS (S54.0)

Excludes2 inherited from the categories above S44.01

Also inherited, and the opposite of Excludes1: these conditions are not part of S44.01, but a patient can have both, so you may code both.

Written on S44 — Injury of nerves at shoulder and upper arm level

injury of brachial plexus (S14.3-)

Risk adjustment

S44.01 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 history

S44.01 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 S44.01

3 child codes. Green means billable.

Related codes at this level

Codes that share S44.0. If S44.01 is not quite right, the correct code is usually one of these.

Questions about S44.01

Is S44.01 a billable ICD-10-CM code?: No. S44.01 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does S44.01 sit in the tabular list?: Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Injuries to the shoulder and upper arm (S40-S49).
What cannot be coded together with S44.01?: S44.01 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 S44.01 (S44.0) and apply to it just the same.