ICD-10-CM S36.400 is the diagnosis code for Unspecified injury of duodenum. This code falls under the section "Injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals" within Chapter 19 — Injury, poisoning and certain other consequences of external causes (S00-T88). It is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
Always refer to the official ICD-10-CM Tabular List for complete coding guidelines. Ensure documentation supports the specificity of the code selected. When in doubt, consult a certified medical coder or the latest CMS guidelines.
Understanding where S36.400 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, S36.400 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
S36.400 is the ICD-10-CM diagnosis code for "Unspecified injury of duodenum". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of S36.400 is S36.40 ("Unspecified injury of small intestine"). S36.400 provides a more specific classification within this category.
S36.400 is located in Section S30-S39 — "Injuries to the abdomen, lower back, lumbar spine, pelvis and external genitals" within Chapter 19 of the ICD-10-CM Tabular List.
Use S36.400 when the patients documented diagnosis matches "Unspecified injury of duodenum" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Unspecified injury of duodenum is S36.400.
Yes, S36.400 can be used as a primary diagnosis code since it is billable and specific.
S36.400 is in Chapter 19 of the ICD-10-CM Tabular List.
Yes, S36.400 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.