ICD-10-CM C20 is the diagnosis code for Malignant neoplasm of rectum. 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 C20. They are mutually exclusive:
Understanding where C20 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, C20 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
C20 is the ICD-10-CM diagnosis code for "Malignant neoplasm of rectum". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
C20 is located in Section C15-C26 — "Malignant neoplasms of digestive organs" within Chapter 2 of the ICD-10-CM Tabular List.
Use C20 when the patients documented diagnosis matches "Malignant neoplasm of rectum" 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 rectum is C20.
Yes, C20 can be used as a primary diagnosis code since it is billable and specific.
C20 is in Chapter 2 of the ICD-10-CM Tabular List.
Type 1 Excludes for C20 include: malignant carcinoid tumor of the rectum (C7A.026).
Yes, C20 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.