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ICD-10 Guide
ICD-10 CodesD22.21

D22.21

Billable

Melanocytic nevi of right ear and external auricular canal

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

Code Description

ICD-10 D22.21 is a billable code used to indicate a diagnosis of melanocytic nevi of right ear and external auricular canal.

Key Diagnostic Point:

Melanocytic nevi, commonly referred to as moles, are benign tumors of melanocytes, the cells responsible for pigment production in the skin. When located on the right ear and external auricular canal, these nevi can vary in size, shape, and color. They are typically asymptomatic but may be monitored for changes that could indicate malignancy. The presence of melanocytic nevi in these areas is often benign, but they require careful evaluation to rule out dysplastic nevi or melanoma, especially if there are changes in appearance or symptoms such as itching or bleeding. Management usually involves observation, but excision may be warranted if there are concerns about malignancy or for cosmetic reasons. Follow-up is essential to monitor for any changes in the nevi, and patients should be educated on self-examination techniques to identify any new or changing lesions.

Code Complexity Analysis

Complexity Rating: Low

Low Complexity

Complexity Factors

  • Specificity of the anatomical location (right ear and external auricular canal)
  • Benign nature of the condition, reducing complexity
  • Clear guidelines for documentation and coding
  • Limited differential diagnoses for this specific code

Audit Risk Factors

  • Inadequate documentation of the lesion's characteristics
  • Failure to document the patient's history of skin lesions
  • Lack of follow-up notes on changes in the nevi
  • Incorrect coding of related procedures or diagnoses

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 examinations, monitoring of existing nevi, and excision of suspicious lesions.

Billing Considerations

Ensure thorough documentation of any changes in the nevi and patient education on self-monitoring.

Otolaryngology

Documentation Requirements

Documentation of any associated symptoms, such as hearing changes or pain.

Common Clinical Scenarios

Evaluation of external ear lesions and potential surgical interventions.

Billing Considerations

Consideration of the impact of lesions on ear function and aesthetics.

Coding Guidelines

Inclusion Criteria

Use D22.21 When
  • According to ICD
  • 10 guidelines, D22
  • 21 should be used when documenting melanocytic nevi specifically located on the right ear and external auricular canal
  • It is important to ensure that the documentation supports the diagnosis and that any associated procedures are accurately coded

Exclusion Criteria

Do NOT use D22.21 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

11400CPT Code

Excision, benign lesion including margins, face, ears, scalp

Clinical Scenario

Used when excising a nevus on the right ear.

Documentation Requirements

Document the size of the lesion and the margins excised.

Specialty Considerations

Ensure that the excision is medically necessary and well-documented.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of conditions like melanocytic nevi, improving the accuracy of patient records and facilitating better management of benign skin lesions.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of conditions like melanocytic nevi, improving the accuracy of patient records and facilitating better management of benign skin lesions.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of conditions like melanocytic nevi, improving the accuracy of patient records and facilitating better management of benign skin lesions.

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 the difference between a melanocytic nevus and melanoma?

A melanocytic nevus is a benign growth of melanocytes, while melanoma is a malignant tumor that can arise from nevi or de novo. Melanomas typically exhibit asymmetry, irregular borders, multiple colors, and larger diameters compared to benign nevi.