Billable / Specific Code
ICD-10-CM C26.9 is the diagnosis code for Malignant neoplasm of ill-defined sites within the digestive system. This code falls under the section "Malignant neoplasms of digestive organs" within Chapter 2 — Neoplasms (C00-D49). 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.
The following conditions should never be coded at the same time as C26.9. They are mutually exclusive:
Understanding where C26.9 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, C26.9 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
C26.9 is the ICD-10-CM diagnosis code for "Malignant neoplasm of ill-defined sites within the digestive system". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
The parent code of C26.9 is C26 ("Malignant neoplasm of other and ill-defined digestive organs"). C26.9 provides a more specific classification within this category.
C26.9 is located in Section C15-C26 — "Malignant neoplasms of digestive organs" within Chapter 2 of the ICD-10-CM Tabular List.
Use C26.9 when the patients documented diagnosis matches "Malignant neoplasm of ill-defined sites within the digestive system" 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 Malignant neoplasm of ill-defined sites within the digestive system is C26.9.
Yes, C26.9 can be used as a primary diagnosis code since it is billable and specific.
C26.9 is in Chapter 2 of the ICD-10-CM Tabular List.
Type 1 Excludes for C26.9 include: malignant neoplasm of abdominal NOS (C76.2); malignant neoplasm of intra-abdominal NOS (C76.2).
Yes, C26.9 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.