Loading...

    Explore
    • Policy Monitoring
    • Live Policy Feed
    • Billing Codes
    • NPI Medicare & Medicaid
    • Healthcare Providers
    • Health Insurance Payers
    • States
    • Service Lines
    • Taxonomy Codes
    Lookup tools
    • Billing Code Lookup
    • CPT Modifier Lookup
    • Provider Taxonomy Code Lookup
    • Healthcare Provider & Facility Lookup
    • Health Insurance Payer Lookup
    • Payer Contact Directory

    Policy & Benchmark Tools

    • Prior Authorization Lookup
    • Coverage Criteria Lookup
    • Timely Filing Lookup
    • Billing Code Reimbursement Rates
    • Payer Comparison Dashboard
    • Facility Comparison Dashboard
    • All tools

    Company

    • About OpenPayer
    • Data Sources
    • Trek Health
    OpenPayerby Trek Health
    LinkedInYouTube

    © 2026 Trek Health. All rights reserved.

    OpenPayer is built and maintained by Trek Health.

    v1.0.28
    OpenPayerBilling CodesMalignant neoplasms of digestive organsICD-10-CM c19-malignant-neoplasm-of-rectosigmoid-junction
    Ask Trek AI about this page

    ICD-10-CM Code For Malignant Neoplasm Of Rectosigmoid Junction: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group C19 includes malignant neoplasms located at the rectosigmoid junction, covering cancers that originate in the terminal sigmoid colon and proximal rectum. These ICD-10-CM diagnosis codes are used to document primary malignant tumors of the rectosigmoid region, capturing tumor location and related clinical complexity relevant to staging and treatment planning. Accurate coding within the ICD-10-CM C19 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

    Customize your policy alerts

    Sign up for ICD-10-CM Code For Malignant Neoplasm Of Rectosigmoid Junction: Group Overview policy alerts

    Get alerted when relevant policies change without checking for updates manually.

    Monitor payer policy activity

    Receive email alerts as soon as relevant payer policies are published or updated.

    ICD-10-CM C19: Malignant Neoplasm Of Rectosigmoid Junction Overview

    The diagnoses in this group represent malignant tumors arising at the rectosigmoid junction, where the sigmoid colon transitions to the rectum. These neoplasms affect the lower gastrointestinal tract and are managed within oncology and gastroenterology care. Accurate coding is important for reflecting disease location and scope, which impacts clinical documentation and reimbursement.

    Table of contents

    Progress1 / 6

    Explore openpayer tools

    • Billing CodesCPT, HCPCS, DRG & more
    • Reimbursement RatesCommercial vs. Medicare rate reports
    • ProvidersHospitals & facilities
    • PayersPlans & market footprint
    • Taxonomy CodesNUCC specialty codes
    • ModifiersCPT modifiers & usage
    • Prior AuthorizationPA policies by payer & drug
    • Timely FilingFiling deadlines by payer
    • Coverage CriteriaMedical necessity by payer
    • Payer ContactsClaims, PA & appeals contacts
    View all tools

    When to Use

    Use a code from this group when documentation identifies a primary malignant neoplasm specifically at the rectosigmoid junction rather than elsewhere in the colon or rectum. Codes are appropriate for encounters related to diagnosis, treatment planning, staging, and ongoing management of rectosigmoid malignancy.

    ICD-10-CM Codes

    1 rows

    ICD-10-CM CodeDescription
    C19Malignant neoplasm of rectosigmoid junction

    DRG Codes

    3 rows

    DRG CodeDescription
    374Digestive Malignancy with MCC
    375Digestive Malignancy with CC
    376Digestive Malignancy without CC/MCC

    Typical Clinical Scenarios

    • An older adult presents to the clinic with a several-month history of progressive change in bowel habits, intermittent rectal bleeding, unexplained weight loss, and iron-deficiency anemia. Colonoscopy reveals a mass at the rectosigmoid junction with biopsy confirming invasive adenocarcinoma; staging and treatment planning are initiated, and the diagnosis is assigned to capture the primary tumor location. Typical codes: C19
    • A patient arrives to the emergency department with acute large‑bowel obstruction characterized by severe abdominal pain, distension, and vomiting; imaging shows a transition point at the rectosigmoid junction caused by a known malignant mass. The acute obstructive presentation in the setting of a malignant tumor at that anatomic site warrants assignment of the diagnosis to document the underlying neoplasm responsible for the emergency. Typical codes: C19
    • A patient with a previously treated rectosigmoid malignancy presents for surveillance and is found on follow‑up imaging to have locally recurrent disease at the original rectosigmoid site causing new tenesmus and bleeding. Because the recurrence is anatomically at the rectosigmoid junction and represents active malignant disease, the diagnosis is used to indicate the site of recurrent tumor. Typical codes: C19

    Related Codes

    C15-MALIGNANT-NEOPLASM-OF-ESOPHAGUS

    ICD-10-CM Code For Malignant Neoplasm Of Esophagus: Group Overview

    C16-MALIGNANT-NEOPLASM-OF-STOMACH

    ICD-10-CM Code For Malignant Neoplasm Of Stomach: Group Overview

    C17-MALIGNANT-NEOPLASM-OF-SMALL-INTESTINE

    ICD-10-CM Code For Malignant Neoplasm Of Small Intestine: Group Overview

    C18-MALIGNANT-NEOPLASM-OF-COLON

    ICD-10-CM Code For Malignant Neoplasm Of Colon: Group Overview

    C20-MALIGNANT-NEOPLASM-OF-RECTUM

    ICD-10-CM Code For Malignant Neoplasm Of Rectum: Group Overview

    C21-MALIGNANT-NEOPLASM-OF-ANUS-AND-ANAL-CANAL

    ICD-10-CM Code For Malignant Neoplasm Of Anus And Anal Canal: Group Overview

    C22-MALIGNANT-NEOPLASM-OF-LIVER

    ICD-10-CM Code For Malignant Neoplasm Of Liver And Intrahepatic Bile Ducts: Group Overview

    C23-MALIGNANT-NEOPLASM-OF-GALLBLADDER

    ICD-10-CM Code For Malignant Neoplasm Of Gallbladder: Group Overview

    C24-MALIGNANT-NEOPLASM-BILIARY-TRACT

    ICD-10-CM Code For Malignant Neoplasm Of Other And Unspecified Parts Of Biliary Tract: Group Overview

    C26-MALIGNANT-NEOPLASM-OTHER-ILL-DEFINED-DIGESTIVE-ORGANS

    ICD-10-CM Code For Malignant Neoplasm Of Other And Ill-Defined Digestive Organs: Group Overview

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
    Published by

    Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

    Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.