ICD-10 Logo
ICDxICD-10 Medical Coding
ICD-10 Logo
ICDxICD-10 Medical Coding
ICD 10 CodesDiagnoses
ICD 10 CodesDiagnoses
ICD-10 Logo
ICDxICD-10 Medical Coding

Comprehensive ICD-10-CM code reference with AI-powered search capabilities.

© 2025 ICD Code Compass. All rights reserved.

Browse

  • All Chapters
  • All Categories
  • Diagnoses

Tools

  • AI Code Search
ICD-10-CM codes are maintained by the CDC and CMS. This tool is for reference purposes only.
v1.0.0
ICD-10 Guide
ICD-10 CodesC13.9

C13.9

Billable

Malignant neoplasm of hypopharynx, unspecified

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

Code Description

ICD-10 C13.9 is a billable code used to indicate a diagnosis of malignant neoplasm of hypopharynx, unspecified.

Key Diagnostic Point:

C13.9 refers to a malignant neoplasm located in the hypopharynx, which is the lower part of the pharynx situated behind the larynx. This code is used when the specific site of the neoplasm within the hypopharynx is not specified. Hypopharyngeal cancers are often associated with risk factors such as tobacco use, alcohol consumption, and human papillomavirus (HPV) infection. The hypopharynx is anatomically connected to the oropharynx and nasopharynx, and cancers in these regions can sometimes present similarly. HPV-positive oropharyngeal cancers have been increasingly recognized, particularly in younger populations, and may have different prognostic implications compared to HPV-negative cases. Treatment typically involves a multidisciplinary approach, including surgery, radiation therapy, and chemotherapy, depending on the stage and location of the cancer. Radiation therapy is a common treatment modality, especially for patients who are not surgical candidates or for those with advanced disease. Accurate coding is essential for appropriate treatment planning and reimbursement.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in documentation regarding the specific site of the neoplasm
  • Differentiation between hypopharyngeal, oropharyngeal, and nasopharyngeal cancers
  • HPV status documentation and its implications for treatment
  • Potential for overlapping symptoms with other head and neck cancers

Audit Risk Factors

  • Inadequate documentation of the specific site of the neoplasm
  • Failure to document HPV status
  • Lack of staging information
  • Inconsistent terminology used in clinical notes

Specialty Focus

Medical Specialties

Oncology

Documentation Requirements

Detailed pathology reports, imaging studies, and treatment plans must be documented.

Common Clinical Scenarios

Patients presenting with dysphagia, weight loss, or neck masses.

Billing Considerations

Ensure that HPV status is documented, as it influences treatment and prognosis.

Otolaryngology

Documentation Requirements

Thorough examination findings, biopsy results, and surgical notes are essential.

Common Clinical Scenarios

Patients with persistent sore throat, hoarseness, or otalgia.

Billing Considerations

Accurate description of the tumor location and extent is crucial for coding.

Coding Guidelines

Inclusion Criteria

Use C13.9 When
  • According to ICD
  • CM guidelines, C13
  • 9 should be used when the specific site of the hypopharyngeal neoplasm is not documented
  • Coders should ensure that all relevant clinical information is captured to support the diagnosis

Exclusion Criteria

Do NOT use C13.9 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

31575CPT Code

Laryngoscopy, flexible, diagnostic

Clinical Scenario

Used for evaluation of suspected hypopharyngeal cancer.

Documentation Requirements

Document findings from the laryngoscopy and any biopsies taken.

Specialty Considerations

Otolaryngologists 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 cancers, including the ability to capture the site and nature of the neoplasm more accurately. This has implications for treatment planning and reimbursement.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of cancers, including the ability to capture the site and nature of the neoplasm more accurately. This has implications for treatment planning and reimbursement.

Reimbursement & Billing Impact

reimbursement.

Resources

Clinical References

  • •
    American Cancer Society - Head and Neck Cancer

Coding & Billing References

  • •
    American Cancer Society - Head and Neck Cancer

Frequently Asked Questions

What is the significance of HPV status in hypopharyngeal cancer?

HPV status can influence treatment decisions and prognosis. HPV-positive cancers may respond differently to treatment and have a better prognosis compared to HPV-negative cases.