Non-Billable / Non-Specific Code
ICD-10-CM S35.31 is the diagnosis code for Injury of portal vein. 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 non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. 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 S35.31 sits in the ICD-10-CM classification helps ensure proper coding:
No, S35.31 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
S35.31 is the ICD-10-CM diagnosis code for "Injury of portal vein". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of S35.31 is S35.3 ("Injury of portal or splenic vein and branches"). S35.31 provides a more specific classification within this category.
S35.31 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.
S35.31 has 3 sub-code(s) that provide more specific detail: S35.311, S35.318, S35.319.
Use S35.31 when the patients documented diagnosis matches "Injury of portal vein" 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 Injury of portal vein is S35.31.
No, S35.31 is non-billable. Use a more specific sub-code for primary diagnosis billing.
S35.31 is in Chapter 19 of the ICD-10-CM Tabular List.
Yes, S35.31 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.