Alphabetic Index FY2027

S41.122A

Laceration with foreign body of left upper arm, initial encounter

FY2027Chapter 19: Injury, poisoning and certain other consequences of external causes/S40–S49 Injuries to the shoulder and upper arm

BillableComplete code, valid to report
Care settingsHome Health Primary · Wound

S41.122A (also written S41122A) is a billable ICD-10-CM diagnosis code for laceration with foreign body of left upper arm, initial encounter. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 108 codes in category S41 (Open wound of shoulder and upper arm). Its 7th character, A, means initial encounter. Its coding notes include a Use additional code instruction, a Code also instruction, 1 Excludes1 entry and 7 Excludes2 entries.

7th character

Category S41 requires a 7th character.

Assembled code S41.122A Open code

Guidelines tips

From the FY2027 Official Guidelines. ICD10Ref adds no rules of its own.

The 7th character depends on whether the patient is in active treatment, not on who sees the patient. An aftercare Z code is not used for injury aftercare.

Guidelines I.C.19.aInjuries: application of 7th charactersRead the official text

Each injury gets its own code unless a combination code exists, with the most serious injury first. Superficial injuries at the same site as a more severe injury are not coded. Injuries during medical care are coded as complications.

Guidelines I.C.19.bCoding of injuriesRead the official text

Use additional code

Add the listed code as a secondary code, if known.

Also from chapter/block level (1 note)
Inherited from Chapter 19 Injury, poisoning and certain other consequences of external causes
  • code to identify any retained foreign body, if applicable (Z18.-)

Code also

Two codes may be needed to describe the condition. This note gives no sequencing order.

Inherited from S41 Open wound of shoulder and upper arm
  • any associated wound infection

Excludes1

Not coded here. The listed conditions generally should not be reported together.

Inherited from S41 Open wound of shoulder and upper arm
  • traumatic amputation of shoulder and upper arm (S48.-)

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

Inherited from S41 Open wound of shoulder and upper arm
  • open fracture of shoulder and upper arm (S42.- with 7th character B or C)
Also from chapter/block level (6 notes)
Inherited from S40–S49 Injuries to the shoulder and upper arm
Inherited from Chapter 19 Injury, poisoning and certain other consequences of external causes
  • birth trauma (P10-P15)
  • obstetric trauma (O70-O71)

Care settings

How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.

Home Health Primary

Accepted as the primary (principal) diagnosis on a home health claim. The Home Health Grouper assigns it to the Wound clinical group.

Source: CMS Home Health Grouper Software v07.2.26, effective October 1, 2026

Includes

Further defines or gives examples of the content of the category.

Also from chapter/block level (2 notes)
Inherited from S40–S49 Injuries to the shoulder and upper arm
  • injuries of axilla
  • injuries of scapular region

Notes

Also from chapter/block level (2 notes)
Inherited from Chapter 19 Injury, poisoning and certain other consequences of external causes
  • 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.