ICD-10-CM Tabular Index · Chapter 19 · FY 2026 S44

Injury of nerves at shoulder and upper arm level (S44) ICD-10-CM

The S44 code range covers injury of nerves at shoulder and upper arm level with 106 ICD-10-CM diagnosis codes. 72 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.

✓ Built from the official CMS FY 2026 datasetEffective Oct 1, 2025 – Sep 30, 2026
106
Diagnosis Codes
72
Billable Codes
S44
Code Range
S40–S49
Parent Section

Code Also

A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.

Type 2 Excludes

A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

7th Character Note

Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.

7th Character

Indicates that a seventh character is to be assigned to codes in a subcategory.

ICD-10-CM

Codes in the S44 Range 106 codes · 72 billable

106 of 106 shown
  • S44 Injury of nerves at shoulder and upper arm levelNon-billable
  • S44.0 Injury of ulnar nerve at upper arm levelNon-billable
  • S44.00 Injury of ulnar nerve at upper arm level, unspecified armNon-billable
  • S44.00XA Injury of ulnar nerve at upper arm level, unspecified arm, initial encounter
  • S44.00XD Injury of ulnar nerve at upper arm level, unspecified arm, subsequent encounter
  • S44.00XS Injury of ulnar nerve at upper arm level, unspecified arm, sequela
  • S44.01 Injury of ulnar nerve at upper arm level, right armNon-billable
  • S44.01XA Injury of ulnar nerve at upper arm level, right arm, initial encounter
  • S44.01XD Injury of ulnar nerve at upper arm level, right arm, subsequent encounter
  • S44.01XS Injury of ulnar nerve at upper arm level, right arm, sequela
  • S44.02 Injury of ulnar nerve at upper arm level, left armNon-billable
  • S44.02XA Injury of ulnar nerve at upper arm level, left arm, initial encounter
  • S44.02XD Injury of ulnar nerve at upper arm level, left arm, subsequent encounter
  • S44.02XS Injury of ulnar nerve at upper arm level, left arm, sequela
  • S44.1 Injury of median nerve at upper arm levelNon-billable
  • S44.10 Injury of median nerve at upper arm level, unspecified armNon-billable
  • S44.10XA Injury of median nerve at upper arm level, unspecified arm, initial encounter
  • S44.10XD Injury of median nerve at upper arm level, unspecified arm, subsequent encounter
  • S44.10XS Injury of median nerve at upper arm level, unspecified arm, sequela
  • S44.11 Injury of median nerve at upper arm level, right armNon-billable
  • S44.11XA Injury of median nerve at upper arm level, right arm, initial encounter
  • S44.11XD Injury of median nerve at upper arm level, right arm, subsequent encounter
  • S44.11XS Injury of median nerve at upper arm level, right arm, sequela
  • S44.12 Injury of median nerve at upper arm level, left armNon-billable
  • S44.12XA Injury of median nerve at upper arm level, left arm, initial encounter
  • S44.12XD Injury of median nerve at upper arm level, left arm, subsequent encounter
  • S44.12XS Injury of median nerve at upper arm level, left arm, sequela
  • S44.2 Injury of radial nerve at upper arm levelNon-billable
  • S44.20 Injury of radial nerve at upper arm level, unspecified armNon-billable
  • S44.20XA Injury of radial nerve at upper arm level, unspecified arm, initial encounter
  • S44.20XD Injury of radial nerve at upper arm level, unspecified arm, subsequent encounter
  • S44.20XS Injury of radial nerve at upper arm level, unspecified arm, sequela
  • S44.21 Injury of radial nerve at upper arm level, right armNon-billable
  • S44.21XA Injury of radial nerve at upper arm level, right arm, initial encounter
  • S44.21XD Injury of radial nerve at upper arm level, right arm, subsequent encounter
  • S44.21XS Injury of radial nerve at upper arm level, right arm, sequela
  • S44.22 Injury of radial nerve at upper arm level, left armNon-billable
  • S44.22XA Injury of radial nerve at upper arm level, left arm, initial encounter
  • S44.22XD Injury of radial nerve at upper arm level, left arm, subsequent encounter
  • S44.22XS Injury of radial nerve at upper arm level, left arm, sequela
  • S44.3 Injury of axillary nerveNon-billable
  • S44.30 Injury of axillary nerve, unspecified armNon-billable
  • S44.30XA Injury of axillary nerve, unspecified arm, initial encounter
  • S44.30XD Injury of axillary nerve, unspecified arm, subsequent encounter
  • S44.30XS Injury of axillary nerve, unspecified arm, sequela
  • S44.31 Injury of axillary nerve, right armNon-billable
  • S44.31XA Injury of axillary nerve, right arm, initial encounter
  • S44.31XD Injury of axillary nerve, right arm, subsequent encounter
  • S44.31XS Injury of axillary nerve, right arm, sequela
  • S44.32 Injury of axillary nerve, left armNon-billable
  • S44.32XA Injury of axillary nerve, left arm, initial encounter
  • S44.32XD Injury of axillary nerve, left arm, subsequent encounter
  • S44.32XS Injury of axillary nerve, left arm, sequela
  • S44.4 Injury of musculocutaneous nerveNon-billable
  • S44.40 Injury of musculocutaneous nerve, unspecified armNon-billable
  • S44.40XA Injury of musculocutaneous nerve, unspecified arm, initial encounter
  • S44.40XD Injury of musculocutaneous nerve, unspecified arm, subsequent encounter
  • S44.40XS Injury of musculocutaneous nerve, unspecified arm, sequela
  • S44.41 Injury of musculocutaneous nerve, right armNon-billable
  • S44.41XA Injury of musculocutaneous nerve, right arm, initial encounter
  • S44.41XD Injury of musculocutaneous nerve, right arm, subsequent encounter
  • S44.41XS Injury of musculocutaneous nerve, right arm, sequela
  • S44.42 Injury of musculocutaneous nerve, left armNon-billable
  • S44.42XA Injury of musculocutaneous nerve, left arm, initial encounter
  • S44.42XD Injury of musculocutaneous nerve, left arm, subsequent encounter
  • S44.42XS Injury of musculocutaneous nerve, left arm, sequela
  • S44.5 Injury of cutaneous sensory nerve at shoulder and upper arm levelNon-billable
  • S44.50 Injury of cutaneous sensory nerve at shoulder and upper arm level, unspecified armNon-billable
  • S44.50XA Injury of cutaneous sensory nerve at shoulder and upper arm level, unspecified arm, initial encounter
  • S44.50XD Injury of cutaneous sensory nerve at shoulder and upper arm level, unspecified arm, subsequent encounter
  • S44.50XS Injury of cutaneous sensory nerve at shoulder and upper arm level, unspecified arm, sequela
  • S44.51 Injury of cutaneous sensory nerve at shoulder and upper arm level, right armNon-billable
  • S44.51XA Injury of cutaneous sensory nerve at shoulder and upper arm level, right arm, initial encounter
  • S44.51XD Injury of cutaneous sensory nerve at shoulder and upper arm level, right arm, subsequent encounter
  • S44.51XS Injury of cutaneous sensory nerve at shoulder and upper arm level, right arm, sequela
  • S44.52 Injury of cutaneous sensory nerve at shoulder and upper arm level, left armNon-billable
  • S44.52XA Injury of cutaneous sensory nerve at shoulder and upper arm level, left arm, initial encounter
  • S44.52XD Injury of cutaneous sensory nerve at shoulder and upper arm level, left arm, subsequent encounter
  • S44.52XS Injury of cutaneous sensory nerve at shoulder and upper arm level, left arm, sequela
  • S44.8 Injury of other nerves at shoulder and upper arm levelNon-billable
  • S44.8X Injury of other nerves at shoulder and upper arm levelNon-billable
  • S44.8X1 Injury of other nerves at shoulder and upper arm level, right armNon-billable
  • S44.8X1A Injury of other nerves at shoulder and upper arm level, right arm, initial encounter
  • S44.8X1D Injury of other nerves at shoulder and upper arm level, right arm, subsequent encounter
  • S44.8X1S Injury of other nerves at shoulder and upper arm level, right arm, sequela
  • S44.8X2 Injury of other nerves at shoulder and upper arm level, left armNon-billable
  • S44.8X2A Injury of other nerves at shoulder and upper arm level, left arm, initial encounter
  • S44.8X2D Injury of other nerves at shoulder and upper arm level, left arm, subsequent encounter
  • S44.8X2S Injury of other nerves at shoulder and upper arm level, left arm, sequela
  • S44.8X9 Injury of other nerves at shoulder and upper arm level, unspecified armNon-billable
  • S44.8X9A Injury of other nerves at shoulder and upper arm level, unspecified arm, initial encounter
  • S44.8X9D Injury of other nerves at shoulder and upper arm level, unspecified arm, subsequent encounter
  • S44.8X9S Injury of other nerves at shoulder and upper arm level, unspecified arm, sequela
  • S44.9 Injury of unspecified nerve at shoulder and upper arm levelNon-billable
  • S44.90 Injury of unspecified nerve at shoulder and upper arm level, unspecified armNon-billable
  • S44.90XA Injury of unspecified nerve at shoulder and upper arm level, unspecified arm, initial encounter
  • S44.90XD Injury of unspecified nerve at shoulder and upper arm level, unspecified arm, subsequent encounter
  • S44.90XS Injury of unspecified nerve at shoulder and upper arm level, unspecified arm, sequela
  • S44.91 Injury of unspecified nerve at shoulder and upper arm level, right armNon-billable
  • S44.91XA Injury of unspecified nerve at shoulder and upper arm level, right arm, initial encounter
  • S44.91XD Injury of unspecified nerve at shoulder and upper arm level, right arm, subsequent encounter
  • S44.91XS Injury of unspecified nerve at shoulder and upper arm level, right arm, sequela
  • S44.92 Injury of unspecified nerve at shoulder and upper arm level, left armNon-billable
  • S44.92XA Injury of unspecified nerve at shoulder and upper arm level, left arm, initial encounter
  • S44.92XD Injury of unspecified nerve at shoulder and upper arm level, left arm, subsequent encounter
  • S44.92XS Injury of unspecified nerve at shoulder and upper arm level, left arm, sequela

About the S44 Code Range

The ICD-10 codes in the S44 section classify injuries to various nerves located at the shoulder and upper arm level. These codes are used to specify nerve damage in this region, including injuries to the ulnar, median, radial, axillary, musculocutaneous, and cutaneous sensory nerves, with further detail on the side of the injury (right, left, or unspecified) and the stage of treatment encounter.

Healthcare providers and coders refer to these codes when documenting and coding nerve injuries such as those identified by terms like "injury of ulnar nerve," "axillary nerve lesion," or "suprascapular nerve injury." For example, the ICD-10 code for injury of the ulnar nerve at the upper arm level includes subcodes that differentiate between initial, subsequent, or sequela encounters for both right and left arms. Similarly, injuries to other nerves including the median, radial, and musculocutaneous nerves are categorized with specific codes. These classifications help accurately describe the nature, location, and timing of nerve injuries for effective medical records and insurance claims involving shoulder and upper arm nerve trauma.

Questions About This Page

How many billable codes are in the S44 range?

Of the 106 codes in this range, 72 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.

What does the S44 range classify?

The range classifies injury of nerves at shoulder and upper arm level. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.

Related References

All ICD-10-CM ChaptersAll of Chapter 19ICD-10-CM Code LookupMS-DRG ReferenceMedicare Code EditsPOA Exempt Codes

Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.