2027 ICD-10-CM Diagnosis Code S54.02XDInjury of ulnar nerve at forearm level, left arm, subsequent encounter

ICD-10-CM Codes›S00–T88›S50-S59›S54

ICD-10-CM S54.02XD
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

S54.02XD is a billable ICD-10-CM diagnosis code for injury of ulnar nerve at forearm level, left arm, subsequent encounter. The 7th character D marks it as a subsequent encounter code, used during routine care in the healing or recovery phase. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 949 through 950. The code is exempt from POA reporting. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Injury to nerves, muscles and tendons, subsequent encounter.

Code Identity

ICD-10-CM Code
S54.02XD
Billable Status
Yes — Valid for Submission
Code Describes
Injury of ulnar nerve at forearm level, left arm, subsequent encounter
Short Description
Injury of ulnar nerve at forearm level, left arm, subs
Parent Code
S54.02
Injury of ulnar nerve at forearm level, left arm

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS50-S59Injuries to the elbow and forearm
CategoryS54Injury of nerves at forearm level
This CodeS54.02XDInjury of ulnar nerve at forearm level, left arm, subsequent encounter

Present on Admission (POA)Billing

S54.02XD is exempt from POA reporting on inpatient claims to general acute care hospitals. Review the other POA exempt codes in Injuries to the elbow and forearm (S50-S59).

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Injury of nerves at forearm level (S54). Use the following options for the applicable episode of care:

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027, published by CMS and the National Center for Health Statistics.

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to S54.02XD: its own notes plus those printed at S54, block S50-S59, and Chapter 19. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From S54 Injury of nerves at forearm level applies to 54 codes
  • injury of nerves at wrist and hand level (S64.-)
From Block S50-S59 Injuries to the elbow and forearm applies to 4,362 codes
  • burns and corrosions (T20-T32)
  • frostbite (T33-T34)
  • injuries of wrist and hand (S60-S69)
  • insect bite or sting, venomous (T63.4)
From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • code to identify any retained foreign body, if applicable (Z18.-)

Code Also

A second code may be needed to fully describe the condition; the note gives no sequencing direction.

From S54 Injury of nerves at forearm level applies to 54 codes
  • any associated open wound (S51.-)

Notes

General instructions on how these codes are used.

From Chapter 19 (S00-T88) Injury, poisoning and certain other consequences of external causes applies to 41,187 codes
  • Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
  • The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

7th Character

Every code in the category takes a 7th character from the listed values, with the placeholder X filling any empty positions before it.

From S54 Injury of nerves at forearm level applies to 54 codes
  • The appropriate 7th character is to be added to each code from category S54
Values for category S54 Encounter: Initial, Subsequent, Sequela
  • Ainitial encounter
  • Dsubsequent encounter this code
  • Ssequela

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name S54.02XD, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming S54.02XD: they are not reported together with it, unless the two conditions are unrelated.

  • S44.0 Injury of ulnar nerve at upper arm level
    ulnar nerve NOS (S54.0) names S54.0, which includes this code

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INJ062
Injury to nerves, muscles and tendons, subsequent encounter
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Arm Injuries and Disorders

Of the 206 bones in your body, three of them are in your arm: the humerus, radius, and ulna. Your arms are also made up of muscles, joints, tendons, and other connective tissue. Injuries to any of these parts of the arm can occur during sports, a fall, or an accident.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert S54.02XD to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
V58.89 Other specfied aftercare
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About S54.02XDOverview

What is the ICD-10 code for injury of ulnar nerve at forearm level, left arm, subsequent encounter?

The ICD-10-CM code for injury of ulnar nerve at forearm level, left arm, subsequent encounter is S54.02XD (sometimes written as S5402XD). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is S54.02XD (Injury of ulnar nerve at forearm level, left arm) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report injury of ulnar nerve at forearm level, left arm, subsequent encounter on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What does the 7th character D in S54.02XD mean?

The final character D marks a subsequent encounter: use it for routine care while the injury of ulnar nerve at forearm level, left arm is healing, after active treatment has ended.

What MS-DRG does S54.02XD group to?

When injury of ulnar nerve at forearm level, left arm, subsequent encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 950, 949, with relative weights from 0.7661 to 1.1231 depending on complications. Higher weights mean higher Medicare reimbursement.

Is S54.02XD exempt from POA reporting?

Yes. CMS lists this code among those exempt from present on admission reporting, so hospitals do not assign a POA indicator for injury of ulnar nerve at forearm level, left arm, subsequent encounter on inpatient claims. The code appears in the Injuries to the elbow and forearm (S50-S59) range of the CMS exempt list.