C19
BillableMalignant neoplasm of rectosigmoid junction
Malignant neoplasm of rectosigmoid junction
Coding Notes
Inclusion Terms
Alternative clinical terms for this condition
- Malignant neoplasm of colon with rectum
- Malignant neoplasm of rectosigmoid (colon)
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
- •Kaposi's sarcoma of gastrointestinal sitesC46.4
- malignant carcinoid tumors of the colon (C7A.02-)
Excludes 2
Conditions not included here, but the patient may have both
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(107)
SNOMED CT
- Primary malignant neoplasm of rectosigmoid junction93980002
- Primary malignant neoplasm of rectum93984006
- Primary malignant neoplasm of sigmoid colon94006002
- Malignant neoplasm of rectum, rectosigmoid junction and anus187760008
- Adenocarcinoma of rectum254582000
- Carcinoma of rectosigmoid junction269544008
- Carcinoma of sigmoid colon285312008
- Adenocarcinoma of sigmoid colon301756000
- Malignant neoplasm of rectosigmoid junction363414004
- Malignant tumor of rectosigmoid junction363414004
- Malignant tumour of rectosigmoid junction363414004
- Rectosigmoid colon cancer363414004
- Adenocarcinoma of rectosigmoid junction425178004
- Adenocarcinoma of anorectum447886005
- Anorectal adenocarcinoma447886005
- MSI-H cancer735385007
- MSI-H solid malignant tumor735385007
- MSI-H solid malignant tumour735385007
- Microsatellite instability-high solid malignant tumor735385007
- Microsatellite instability-high solid malignant tumour735385007
- Mismatch repair deficient solid malignant tumor735385007
- Mismatch repair deficient solid malignant tumour735385007
- dMMR cancer735385007
- dMMR solid malignant tumor735385007
- dMMR solid malignant tumour735385007
- MSI-H colorectal cancer737058005
- Microsatellite instability-high colorectal cancer737058005
- Mismatch repair deficient colorectal cancer737058005
- dMMR colorectal cancer737058005
- Primary carcinoma of sigmoid colon1259432001
- Primary carcinoma of colon1259436003
- Primary carcinoma of rectosigmoid junction1259437007
- Primary rectosigmoid junction cancer1259437007
- Colorectal cancer1286877004
- Malignant colorectal neoplasm1286877004
- Malignant neoplasm of caecum and/or colon and/or rectum1286877004
- Malignant neoplasm of cecum and/or colon and/or rectum1286877004
- Malignant neoplasm of colorectum1286877004
- HER2 (human epidermal growth factor 2)-expressing malignant neoplasm of colorectum1286879001
- Malignant neoplasm of caecum and/or colon and/or rectum expressing human epidermal growth factor 21286879001
- Malignant neoplasm of cecum and/or colon and/or rectum expressing human epidermal growth factor 21286879001
- Malignant neoplasm of colorectum expressing human epidermal growth factor 21286879001
- Primary adenocarcinoma of colon1701000119104
- Primary adenocarcinoma of rectosigmoid junction184881000119106
UMLS
- Malignant Neoplasm of Rectosigmoid JunctionC0153443
- Malignant Neoplasm of the Rectosigmoid JunctionC0153443
- Malignant Rectosigmoid NeoplasmC0153443
- Malignant Rectosigmoid TumorC0153443
- Malignant Tumor of Rectosigmoid JunctionC0153443
- Malignant Tumor of the Rectosigmoid JunctionC0153443
- Malignant neoplasm of rectosigmoid (colon)C0153443
- Malignant neoplasm of rectosigmoid junctionC0153443
- Malignant neoplasm of rectosigmoid junction (disorder)C0153443
- Malignant tumor of rectosigmoid junctionC0153443
- Malignant tumour of rectosigmoid junctionC0153443
- Rectosigmoid colon cancerC0153443
- Malignant neoplasm of colon with rectumC2919144
Clinical Terms
- MSI-H colorectal cancer
- dMMR colorectal cancer
- Anorectal adenocarcinoma
- Adenocarcinoma of anorectum
- Adenocarcinoma of rectum
- dMMR solid malignant tumor
- Malignant neoplasm of caecum and/or colon and/or rectum expressing human epidermal growth factor 2
- Primary adenocarcinoma of colon
- Mismatch repair deficient colorectal cancer
- HER2 (human epidermal growth factor 2)-expressing malignant neoplasm of colorectum
- MSI-H solid malignant tumour
- Microsatellite instability-high colorectal cancer
- dMMR solid malignant tumour
- Adenocarcinoma of sigmoid colon
- Primary carcinoma of sigmoid colon
- Malignant neoplasm of cecum and/or colon and/or rectum
- Malignant tumour of rectosigmoid junction
- Primary adenocarcinoma of rectosigmoid junction
- Colorectal cancer
- Malignant tumor of rectosigmoid junction
- Primary malignant neoplasm of rectum
- dMMR cancer
- MSI-H solid malignant tumor
- Primary malignant neoplasm of sigmoid colon
- Malignant Neoplasm of the Rectosigmoid Junction
- Mismatch repair deficient solid malignant tumor
- MSI-H cancer
- Malignant neoplasm of colorectum expressing human epidermal growth factor 2
- Primary malignant neoplasm of rectosigmoid junction
- Rectosigmoid colon cancer
- Malignant Rectosigmoid Neoplasm
- Primary carcinoma of rectosigmoid junction
- Microsatellite instability-high solid malignant tumour
- Malignant neoplasm of rectosigmoid junction (disorder)
- Mismatch repair deficient solid malignant tumour
- Malignant neoplasm of cecum and/or colon and/or rectum expressing human epidermal growth factor 2
- Adenocarcinoma of rectosigmoid junction
- Primary rectosigmoid junction cancer
- Carcinoma of sigmoid colon
- Malignant Tumor of the Rectosigmoid Junction
- Malignant Rectosigmoid Tumor
- Carcinoma of rectosigmoid junction
- Primary carcinoma of colon
- Malignant neoplasm of rectum, rectosigmoid junction and anus
- Malignant colorectal neoplasm
- Malignant neoplasm of colon with rectum
- Malignant neoplasm of caecum and/or colon and/or rectum
- Malignant neoplasm of rectosigmoid (colon)
- Malignant neoplasm of colorectum
- Microsatellite instability-high solid malignant tumor
Frequently Asked Questions
What is the ICD-10 code for malignant neoplasm of rectosigmoid junction?
The ICD-10-CM code for malignant neoplasm of rectosigmoid junction is C19. The full clinical description is "Malignant neoplasm of rectosigmoid junction". C19 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code C19 mean?
ICD-10-CM code C19 represents “Malignant neoplasm of rectosigmoid junction”. It is classified under Chapter 2: Neoplasms and is a billable/specific code that can be used on a claim.
Is C19 a billable code?
Yes, C19 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is C19 in?
C19 is in Chapter 2: Neoplasms (codes C00-D49).
What codes cannot be used with C19?
C19 has Excludes1 notes indicating codes that cannot be used together with it, including: Kaposi's sarcoma of gastrointestinal sites (C46.4); malignant carcinoid tumors of the colon (C7A.02-).
What SNOMED CT codes does C19 map to?
C19 maps to 20 SNOMED CT concepts: 447886005, 425178004, 254582000, 301756000, 269544008, and 15 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for C19?
C19 is linked to 2 UMLS Concept Unique Identifiers: C0153443, C2919144. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does C19 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like malignant neoplasm of rectosigmoid junction affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of C19?
C19 maps to the ICD-11 code: 2B91.Z (Malignant neoplasms of rectosigmoid junction, unspecified).
Automate ICD-10 Coding With AI
Send clinical text to the AutoICD API and get back structured ICD-10 codes with confidence scores. Integrates into any EHR or billing system in minutes.
Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.