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ICD-10 Guide
ICD-10 CodesD22.20

D22.20

Billable

Melanocytic nevi of unspecified ear and external auricular canal

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

Code Description

ICD-10 D22.20 is a billable code used to indicate a diagnosis of melanocytic nevi of unspecified ear and external auricular canal.

Key Diagnostic Point:

Melanocytic nevi, commonly known as moles, are benign tumors that arise from melanocytes, the pigment-producing cells in the skin. When located on the ear or external auricular canal, these nevi can vary in appearance, size, and color. They are typically asymptomatic and may be present at birth or develop over time. While most melanocytic nevi are benign, they can occasionally undergo changes that warrant further evaluation to rule out malignancy. The unspecified designation indicates that the specific characteristics of the nevi have not been detailed, which may complicate the clinical picture. Management usually involves monitoring for changes in size, shape, or color, and surgical excision may be considered if there are concerns about atypical features. Follow-up care is essential to ensure that any changes are promptly addressed, particularly in patients with a history of skin cancer or multiple nevi. Regular skin examinations are recommended to monitor for new lesions or changes in existing ones.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Unspecified location may lead to ambiguity in documentation.
  • Potential for misclassification with malignant lesions.
  • Variability in clinical presentation requiring careful assessment.
  • Need for thorough patient history to determine risk factors.

Audit Risk Factors

  • Inadequate documentation of the lesion's characteristics.
  • Failure to document patient history related to skin cancer.
  • Lack of follow-up notes on changes in the nevi.
  • Misuse of unspecified codes leading to potential denials.

Specialty Focus

Medical Specialties

Dermatology

Documentation Requirements

Detailed descriptions of the nevi, including size, color, and any changes over time.

Common Clinical Scenarios

Routine skin checks, evaluation of changing moles, and excision of suspicious lesions.

Billing Considerations

Ensure clear documentation of any atypical features and patient history of skin cancer.

Otolaryngology

Documentation Requirements

Comprehensive ear examinations and any associated symptoms such as hearing loss or pain.

Common Clinical Scenarios

Assessment of external ear lesions and management of ear-related skin conditions.

Billing Considerations

Document any functional implications of lesions in the external auricular canal.

Coding Guidelines

Inclusion Criteria

Use D22.20 When
  • According to ICD
  • 10 coding guidelines, D22
  • 20 should be used when the specific location of the melanocytic nevi is not documented
  • Coders should ensure that the documentation supports the use of this code and that any related conditions are also coded appropriately

Exclusion Criteria

Do NOT use D22.20 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

11400CPT Code

Excision, benign lesion

Clinical Scenario

Used when a nevus is excised for further evaluation.

Documentation Requirements

Document the size, location, and reason for excision.

Specialty Considerations

Dermatologists should ensure clear documentation of the excision margins.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of skin lesions, improving the accuracy of data collection and reimbursement. D22.20 provides a clear designation for benign nevi, facilitating better management and follow-up.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of skin lesions, improving the accuracy of data collection and reimbursement. D22.20 provides a clear designation for benign nevi, facilitating better management and follow-up.

Reimbursement & Billing Impact

reimbursement. D22.20 provides a clear designation for benign nevi, facilitating better management and follow-up.

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 should I document when coding D22.20?

Document the characteristics of the nevi, any changes over time, and the patient's history related to skin cancer. Ensure that the documentation supports the use of this unspecified code.