Billable / Specific Code
ICD-10-CM C19 is the diagnosis code for Malignant neoplasm of rectosigmoid junction. 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 C19. They are mutually exclusive:
Understanding where C19 sits in the ICD-10-CM classification helps ensure proper coding:
Yes, C19 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
C19 is the ICD-10-CM diagnosis code for "Malignant neoplasm of rectosigmoid junction". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
C19 is located in Section C15-C26 — "Malignant neoplasms of digestive organs" within Chapter 2 of the ICD-10-CM Tabular List.
Use C19 when the patients documented diagnosis matches "Malignant neoplasm of rectosigmoid junction" 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 rectosigmoid junction is C19.
Yes, C19 can be used as a primary diagnosis code since it is billable and specific.
C19 is in Chapter 2 of the ICD-10-CM Tabular List.
Type 1 Excludes for C19 include: malignant carcinoid tumors of the colon (C7A.02-).
Yes, C19 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.