S31.10
Unspecified open wound of abdominal wall without penetration into peritoneal cavity
S31.10 is a non-billable ICD-10-CM code header for unspecified open wound of abdominal wall without penetration into peritoneal cavity. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are S31.100 Unspecified open wound of abdominal wall, right upper quadrant without penetration into peritoneal cavity; S31.101 Unspecified open wound of abdominal wall, left upper quadrant without penetration into peritoneal cavity; S31.102 Unspecified open wound of abdominal wall, epigastric region without penetration into peritoneal cavity; S31.103 Unspecified open wound of abdominal wall, right lower quadrant without penetration into peritoneal cavity and 6 more. Its coding notes include a Use additional code instruction, a Code also instruction, 1 Excludes1 entry and 11 Excludes2 entries.
7th characters
Every code below needs one of these (defined at S31).
The appropriate 7th character is to be added to each code from category S31
- Ainitial encounter
- Dsubsequent encounter
- Ssequela
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.
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.
Use additional code
Add the listed code as a secondary code, if known.
Also from chapter/block level (1 note)
- 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.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
- open wound of abdominal wall with penetration into peritoneal cavity (S31.6-)
Also from chapter/block level (8 notes)
- birth trauma (P10-P15)
- obstetric trauma (O70-O71)
Includes
Further defines or gives examples of the content of the category.
Also from chapter/block level (6 notes)
- injuries to the abdominal wall
- injuries to the anus
- injuries to the buttock
- injuries to the external genitalia
- injuries to the flank
- injuries to the groin
Notes
Also from chapter/block level (2 notes)
- 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.
More specific codes under S31.10 10
- S31.100Unspecified open wound of abdominal wall, right upper quadrant without penetration into peritoneal cavity7th char needed
- S31.101Unspecified open wound of abdominal wall, left upper quadrant without penetration into peritoneal cavity7th char needed
- S31.102Unspecified open wound of abdominal wall, epigastric region without penetration into peritoneal cavity7th char needed
- S31.103Unspecified open wound of abdominal wall, right lower quadrant without penetration into peritoneal cavity7th char needed
- S31.104Unspecified open wound of abdominal wall, left lower quadrant without penetration into peritoneal cavity7th char needed
- S31.105Unspecified open wound of abdominal wall, periumbilic region without penetration into peritoneal cavity7th char needed
- S31.106Unspecified open wound of abdominal wall, right flank without penetration into peritoneal cavity7th char needed
- S31.107Unspecified open wound of abdominal wall, left flank without penetration into peritoneal cavity7th char needed
- S31.109Unspecified open wound of abdominal wall, unspecified quadrant without penetration into peritoneal cavity7th char needed
- S31.10AUnspecified open wound of abdominal wall, unspecified flank without penetration into peritoneal cavity7th char needed