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ICD-10 Guide
ICD-10 CodesC18.5

C18.5

Billable

Malignant neoplasm of splenic flexure

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/05/2025

Code Description

ICD-10 C18.5 is a billable code used to indicate a diagnosis of malignant neoplasm of splenic flexure.

Key Diagnostic Point:

C18.5 refers to a malignant neoplasm located at the splenic flexure of the colon, which is the bend in the colon near the spleen. This type of cancer is part of colorectal cancer, which is characterized by the uncontrolled growth of abnormal cells in the colon or rectum. The splenic flexure is a critical area where the transverse colon transitions into the descending colon. Symptoms may include abdominal pain, changes in bowel habits, weight loss, and rectal bleeding. Diagnosis typically involves imaging studies, colonoscopy, and biopsy. Staging of colorectal cancer is crucial for determining the extent of disease and guiding treatment options, which may include surgery, chemotherapy, and radiation therapy. The presence of microsatellite instability (MSI) can indicate a specific subtype of colorectal cancer that may respond differently to treatment. Early detection through screening methods such as colonoscopy is vital for improving outcomes, as colorectal cancer is often asymptomatic in its early stages.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Requires accurate staging information for treatment planning.
  • Differentiation from benign conditions and other malignancies.
  • Documentation of specific location and extent of the tumor.
  • Need for comprehensive patient history and diagnostic tests.

Audit Risk Factors

  • Inadequate documentation of tumor location.
  • Failure to document staging information.
  • Misclassification of the neoplasm as benign.
  • Lack of supporting diagnostic tests in the medical record.

Specialty Focus

Medical Specialties

Oncology

Documentation Requirements

Detailed pathology reports, imaging studies, and treatment plans.

Common Clinical Scenarios

Diagnosis and treatment planning for colorectal cancer, follow-up care.

Billing Considerations

Ensure accurate staging and documentation of treatment response.

Gastroenterology

Documentation Requirements

Colonoscopy reports, biopsy results, and patient history.

Common Clinical Scenarios

Screening for colorectal cancer, management of symptoms.

Billing Considerations

Document findings from colonoscopy and any polyps or lesions.

Coding Guidelines

Inclusion Criteria

Use C18.5 When
  • Follow the official ICD
  • CM coding guidelines, ensuring accurate documentation of the diagnosis, staging, and any related procedures
  • Include any relevant co
  • morbidities that may affect treatment

Exclusion Criteria

Do NOT use C18.5 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

45378CPT Code

Colonoscopy, flexible, diagnostic

Clinical Scenario

Used for initial diagnosis and surveillance of colorectal cancer.

Documentation Requirements

Colonoscopy report detailing findings and any biopsies taken.

Specialty Considerations

Gastroenterologists must document the extent of the procedure and findings.

44140CPT Code

Colectomy, partial, with anastomosis

Clinical Scenario

Performed for resection of malignant neoplasm at the splenic flexure.

Documentation Requirements

Operative report detailing the procedure and pathology results.

Specialty Considerations

Surgeons must ensure accurate coding based on the extent of resection.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of malignant neoplasms, improving the accuracy of cancer registries and treatment planning. C18.5 provides a clear indication of the tumor's location, which is essential for staging and treatment.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of malignant neoplasms, improving the accuracy of cancer registries and treatment planning. C18.5 provides a clear indication of the tumor's location, which is essential for staging and treatment.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of malignant neoplasms, improving the accuracy of cancer registries and treatment planning. C18.5 provides a clear indication of the tumor's location, which is essential for staging and treatment.

Resources

Clinical References

  • •
    American Cancer Society - Colorectal Cancer

Coding & Billing References

  • •
    American Cancer Society - Colorectal Cancer

Frequently Asked Questions

What is the significance of microsatellite instability in colorectal cancer?

Microsatellite instability (MSI) is a condition of genetic hypermutability that can occur in colorectal cancer. It is significant because tumors with MSI may respond differently to certain treatments, such as immunotherapy, and can indicate a hereditary cancer syndrome.