ICD10BillableValid for clinical use

ICD-10 Code S36.420: Contusion of duodenum

S36.420 is a billable ICD-10 diagnosis code used to classify Contusion of duodenum 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 contusion of duodenum 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
S36Injury of intra-abdominal organs
category
S36.4Injury of small intestine
category
S36.42Contusion of small intestine
currentS36.42

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

Coding guidelines

Common synonyms

Contusion of duodenum

Frequently asked questions

Code details

CodeS36.420
SystemICD10
Display nameContusion of duodenum
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
Contusion(skin surface intact)InjuryInjury

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 S36.420 for Contusion of duodenum | HealthAssure