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ICD10BillableValid for clinical use

ICD-10 Code S31.609: Unspecified open wound of abdominal wall, unspecified quadrant with penetration into peritoneal cavity

S31.609 is a billable ICD-10 diagnosis code used to classify Unspecified open wound of abdominal wall, unspecified quadrant with penetration into peritoneal cavity in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Injury, poisoning and certain other consequences of external causes (S00-T88).

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Injury, poisoning and certain other consequences of external causes (S00-T88).

When is it used?

  • May be used when a clinician documents unspecified open wound of abdominal wall, unspecified quadrant with penetration into peritoneal cavity in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
19Injury, poisoning and certain other consequences of external causes (S00-T88)
block
S30-S39Injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals
category
S31Open wound of abdomen, lower back, pelvis and external genitals
category
S31.6Open wound of abdominal wall with penetration into peritoneal cavity
category
S31.60Unspecified open wound of abdominal wall with penetration into peritoneal cavity
currentS31.60

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

Emergency Medicine SpecialistOrthopedic Specialist

Related codes

S31.600Unspecified open wound of abdominal wall, right upper quadrant with penetration into peritoneal cavitycodeS31.601Unspecified open wound of abdominal wall, left upper quadrant with penetration into peritoneal cavitycodeS31.602Unspecified open wound of abdominal wall, epigastric region with penetration into peritoneal cavitycodeS31.603Unspecified open wound of abdominal wall, right lower quadrant with penetration into peritoneal cavitycodeS31.604Unspecified open wound of abdominal wall, left lower quadrant with penetration into peritoneal cavitycodeS31.605Unspecified open wound of abdominal wall, periumbilic region with penetration into peritoneal cavitycodeS31.606Unspecified open wound of abdominal wall, right flank with penetration into peritoneal cavitycodeS31.607Unspecified open wound of abdominal wall, left flank with penetration into peritoneal cavitycodeS31.60AUnspecified open wound of abdominal wall, unspecified flank with penetration into peritoneal cavitycode

Sibling codes

S31.600Unspecified open wound of abdominal wall, right upper quadrant with penetration into peritoneal cavitybillableS31.601Unspecified open wound of abdominal wall, left upper quadrant with penetration into peritoneal cavitybillableS31.602Unspecified open wound of abdominal wall, epigastric region with penetration into peritoneal cavitybillableS31.603Unspecified open wound of abdominal wall, right lower quadrant with penetration into peritoneal cavitybillableS31.604Unspecified open wound of abdominal wall, left lower quadrant with penetration into peritoneal cavitybillableS31.605Unspecified open wound of abdominal wall, periumbilic region with penetration into peritoneal cavitybillableS31.606Unspecified open wound of abdominal wall, right flank with penetration into peritoneal cavitybillableS31.607Unspecified open wound of abdominal wall, left flank with penetration into peritoneal cavitybillableS31.60AUnspecified open wound of abdominal wall, unspecified flank with penetration into peritoneal cavitybillable

Coding guidelines

Common synonyms

Unspecified open wound of abdominal wall, unspecified quadrant with penetration into peritoneal cavityUnspecified open wound of abdominal wall

Frequently asked questions

Code details

CodeS31.609
SystemICD10
Display nameUnspecified open wound of abdominal wall, unspecified quadrant with penetration into peritoneal cavity
ChapterInjury, poisoning and certain other consequences of external causes (S00-T88)
BlockInjuries to the abdomen, lower back, lumbar spine, pelvis and external genitals

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
Wound, open

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

ICD-10 Code S31.609 for Unspecified open wound of abdominal wall, unspecified quadrant with penetration into peritoneal cavity | HealthAssure