2027 ICD-10-CM Diagnosis Code S14.3XXAInjury of brachial plexus, initial encounter
S14.3XXA is a billable ICD-10-CM diagnosis code for injury of brachial plexus, initial encounter. The 7th character A marks it as an initial encounter code, used while the patient is receiving active treatment. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 73 through 74, 791, 793, 963 through 965. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Injury to nerves, muscles and tendons, initial encounter.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Brachial plexopathy of left upper limb
- Brachial plexopathy of right upper limb
- Closed injury, brachial plexus, all roots
- Closed injury, brachial plexus, lower roots
- Closed injury, brachial plexus, upper roots
- Crutch paralysis
- Injury of brachial plexus
- Injury of brachial plexus cord
- Injury of brachial plexus division
- Injury of brachial plexus of left upper limb
- Injury of brachial plexus of right upper limb
- Injury of brachial plexus trunk
- Open injury, brachial plexus, all roots
- Open injury, brachial plexus, lower roots
- Open injury, brachial plexus, upper roots
- Traction injury of brachial plexus
- Traction injury of peripheral nerve
- Upper brachial plexus neuropathy
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Injury of nerves and spinal cord at neck level (S14). 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 S14.3XXA: its own notes plus those printed at S14, block S10-S19, and Chapter 19. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- injuries of nape
- injuries of supraclavicular region
- injuries of throat
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.
Use Additional Code
Add a second code, after this one, to fully describe the condition.
- 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.
Notes
General instructions on how these codes are used.
- Code to highest level of cervical cord injury
- 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.
- The appropriate 7th character is to be added to each code from category S14
- Ainitial encounter this code
- Dsubsequent encounter
- 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 S14.3XXA, its category, or a range that includes it.
Excludes1 1
These codes carry an Excludes1 note naming S14.3XXA: they are not reported together with it, unless the two conditions are unrelated.
Excludes2 2
These codes carry an Excludes2 note naming S14.3XXA: its condition is not part of those codes, and both may be reported when the patient has both.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Brachial Plexus Injuries
The brachial plexus is a network of nerves that sends signals from the spine to the shoulder, arm, and hand. Damage to the brachial plexus can cause symptoms such as:
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert S14.3XXA to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About S14.3XXAOverview
What is the ICD-10 code for injury of brachial plexus, initial encounter?
The ICD-10-CM code for injury of brachial plexus, initial encounter is S14.3XXA (sometimes written as S143XXA). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is S14.3XXA (Injury of brachial plexus) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report injury of brachial plexus, initial encounter on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What does the 7th character A in S14.3XXA mean?
The final character A marks the initial encounter: use it while the patient is receiving active treatment for injury of brachial plexus, such as an emergency visit or first evaluation.
What MS-DRG does S14.3XXA group to?
When injury of brachial plexus, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 793, 791, 964, 965, 74, 73, 963, with relative weights from 1.0054 to 4.2192 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of S14.3XXA?
Under the General Equivalence Mappings, injury of brachial plexus, initial encounter converts to ICD-9-CM 953.4 (brachial plexus injury). The mapping is approximate, so confirm the match fits the documentation.
