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ICD-10 Guide
ICD-10 CodesD01.9

D01.9

Billable

Carcinoma in situ of digestive organ, unspecified

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

Code Description

ICD-10 D01.9 is a billable code used to indicate a diagnosis of carcinoma in situ of digestive organ, unspecified.

Key Diagnostic Point:

Carcinoma in situ (CIS) of the digestive organ refers to a localized cancerous condition where abnormal cells are present in the lining of the digestive tract but have not invaded deeper tissues or spread to other parts of the body. This condition is often asymptomatic and may be discovered incidentally during routine examinations or imaging studies. The digestive organs include the esophagus, stomach, intestines, liver, pancreas, and rectum. Surveillance protocols for patients diagnosed with CIS typically involve regular endoscopic evaluations, imaging studies, and biopsies to monitor for progression to invasive cancer. The risk of progression varies depending on the specific organ involved, the histological type of carcinoma, and patient factors such as age and comorbidities. Early detection and intervention are crucial, as timely treatment can significantly improve outcomes and reduce the risk of developing invasive cancer.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Unspecified nature of the code can lead to ambiguity in documentation.
  • Requires understanding of various digestive organs and their specific carcinomas.
  • Differentiating between in situ and invasive cancers can be challenging.
  • Documentation must clearly indicate the diagnosis and its implications for treatment.

Audit Risk Factors

  • Insufficient documentation to support the diagnosis of carcinoma in situ.
  • Failure to specify the digestive organ involved.
  • Inadequate follow-up documentation for surveillance protocols.
  • Misalignment between clinical findings and coded diagnosis.

Specialty Focus

Medical Specialties

Oncology

Documentation Requirements

Detailed pathology reports, imaging studies, and treatment plans.

Common Clinical Scenarios

Diagnosis of carcinoma in situ during routine screenings or imaging.

Billing Considerations

Ensure clear documentation of the type of carcinoma and its location.

Gastroenterology

Documentation Requirements

Endoscopy reports, biopsy results, and follow-up care notes.

Common Clinical Scenarios

Surveillance of patients with a history of gastrointestinal carcinoma in situ.

Billing Considerations

Document the rationale for surveillance intervals and any findings during procedures.

Coding Guidelines

Inclusion Criteria

Use D01.9 When
  • Follow the official ICD
  • CM coding guidelines, ensuring that the diagnosis is supported by clinical documentation
  • Include details about the specific digestive organ involved and any relevant treatment or surveillance protocols

Exclusion Criteria

Do NOT use D01.9 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

45378CPT Code

Colonoscopy, flexible, diagnostic

Clinical Scenario

Used for surveillance in patients with carcinoma in situ of the colon.

Documentation Requirements

Document findings, biopsies taken, and follow-up plans.

Specialty Considerations

Gastroenterologists should ensure thorough documentation of the procedure and findings.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of carcinoma in situ, improving the ability to track and manage these conditions. D01.9 provides a broad category that can lead to more accurate data collection and analysis.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of carcinoma in situ, improving the ability to track and manage these conditions. D01.9 provides a broad category that can lead to more accurate data collection and analysis.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of carcinoma in situ, improving the ability to track and manage these conditions. D01.9 provides a broad category that can lead to more accurate data collection and analysis.

Resources

Clinical References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Coding & Billing References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Frequently Asked Questions

What is carcinoma in situ?

Carcinoma in situ is a localized cancer that has not invaded surrounding tissues. It is often detected early and can be treated effectively to prevent progression to invasive cancer.

How is carcinoma in situ monitored?

Patients with carcinoma in situ are typically monitored through regular imaging studies, endoscopic evaluations, and biopsies to assess for any changes or progression.