2027 ICD-10-CM Diagnosis Code S45.211ALaceration of axillary or brachial vein, right side, initial encounter

ICD-10-CM Codes›S00–T88›S40-S49›S45

ICD-10-CM S45.211A
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

S45.211A is a billable ICD-10-CM diagnosis code for laceration of axillary or brachial vein, right side, 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 913 through 914, 963 through 965. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 60 closely related codes. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Injury to blood vessels, initial encounter.

Code Identity

ICD-10-CM Code
S45.211A
Billable Status
Yes — Valid for Submission
Code Describes
Laceration of axillary or brachial vein, right side, initial encounter
Short Description
Laceration of axillary or brachial vein, right side, init
Parent Code
S45.211
Laceration of axillary or brachial vein, right side

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionS40-S49Injuries to the shoulder and upper arm
CategoryS45Injury of blood vessels at shoulder and upper arm level
This CodeS45.211ALaceration of axillary or brachial vein, right side, initial encounter

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Injury of blood vessels at shoulder and upper arm level (S45). 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 S45.211A: its own notes plus those printed at S45, block S40-S49, 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.

From Block S40-S49 Injuries to the shoulder and upper arm applies to 2,730 codes
  • injuries of axilla
  • injuries of scapular region

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 S45 Injury of blood vessels at shoulder and upper arm level applies to 162 codes
  • injury of subclavian artery (S25.1)
  • injury of subclavian vein (S25.3)
From Block S40-S49 Injuries to the shoulder and upper arm applies to 2,730 codes
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 S45 Injury of blood vessels at shoulder and upper arm level applies to 162 codes
  • any associated open wound (S41.-)

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 S45 Injury of blood vessels at shoulder and upper arm level applies to 162 codes
  • The appropriate 7th character is to be added to each code from category S45
Values for category S45 Encounter: Initial, Subsequent, Sequela
  • 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 S45.211A, its category, or a range that includes it.

Excludes2 1

These codes carry an Excludes2 note naming S45.211A: its condition is not part of those codes, and both may be reported when the patient has both.

  • S55 Injury of blood vessels at forearm level
    injury of brachial vessels (S45.1-S45.2) names S45.1-S45.2, which includes this code

Clinical ClassificationClinical

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

CCSR INJ016
Injury to blood vessels, initial 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 S45.211A to ICD-9-CMHistory

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

ICD-9-CM
903.02 Injury axillary vein
Approximate The match is approximate rather than exact.
ICD-9-CM
903.1 Injury brachial vessels
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 S45.211AOverview

What is the ICD-10 code for laceration of axillary or brachial vein, right side, initial encounter?

The ICD-10-CM code for laceration of axillary or brachial vein, right side, initial encounter is S45.211A (sometimes written as S45211A). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is S45.211A (Laceration of axillary or brachial vein, right side) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report laceration of axillary or brachial vein, right side, initial encounter on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What does the 7th character A in S45.211A mean?

The final character A marks the initial encounter: use it while the patient is receiving active treatment for laceration of axillary or brachial vein, right side, such as an emergency visit or first evaluation.

What MS-DRG does S45.211A group to?

When laceration of axillary or brachial vein, right side, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 964, 965, 914, 913, 963, with relative weights from 0.9281 to 2.6361 depending on complications. Higher weights mean higher Medicare reimbursement.

Is S45.211A a CC or MCC?

CMS lists S45.211A as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 60 closely related codes in its exclusion list.