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v1.0.0
ICD-10 Guide
ICD-10 CodesN90.9

N90.9

Billable

Noninflammatory disorder of vulva and perineum, unspecified

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/18/2025

Code Description

ICD-10 N90.9 is a billable code used to indicate a diagnosis of noninflammatory disorder of vulva and perineum, unspecified.

Key Diagnostic Point:

N90.9 refers to a noninflammatory disorder affecting the vulva and perineum, which encompasses a range of conditions that do not involve inflammation. These disorders can include various benign lesions, skin conditions, and other abnormalities that may affect the vulvar and perineal regions. Common examples include vulvar dystrophy, lichen sclerosus, and other skin disorders that may not present with overt inflammatory signs. Patients may experience symptoms such as itching, discomfort, or changes in skin appearance, but without the classic signs of inflammation like redness or swelling. Accurate diagnosis often requires a thorough clinical examination and may involve biopsy or other diagnostic procedures to rule out inflammatory or neoplastic processes. This code is used when the specific nature of the disorder is not clearly defined, necessitating a broader classification. It is essential for coders to understand the nuances of these conditions to ensure appropriate coding and billing.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variety of noninflammatory conditions that can be classified under this code
  • Need for precise clinical documentation to differentiate from inflammatory disorders
  • Potential overlap with other codes for vulvar and perineal disorders
  • Variability in clinical presentation and symptoms among patients

Audit Risk Factors

  • Insufficient documentation to support the diagnosis
  • Misuse of the code for inflammatory conditions
  • Inconsistent clinical findings reported in the medical record
  • Failure to document the patient's symptoms adequately

Specialty Focus

Medical Specialties

Gynecology

Documentation Requirements

Detailed examination findings, patient history, and any diagnostic tests performed.

Common Clinical Scenarios

Patients presenting with vulvar itching, lesions, or discomfort without signs of inflammation.

Billing Considerations

Ensure that all symptoms and clinical findings are documented to support the diagnosis.

Dermatology

Documentation Requirements

Skin examination details, biopsy results, and treatment plans.

Common Clinical Scenarios

Patients with skin disorders affecting the vulvar area, such as lichen sclerosus or vulvar dystrophy.

Billing Considerations

Document any differential diagnoses considered and the rationale for the final diagnosis.

Coding Guidelines

Inclusion Criteria

Use N90.9 When
  • According to ICD
  • 10 coding guidelines, N90
  • 9 should be used when the specific type of noninflammatory disorder is not documented
  • Coders should ensure that the medical record supports the diagnosis and that no inflammatory conditions are present

Exclusion Criteria

Do NOT use N90.9 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

58100CPT Code

Endometrial biopsy

Clinical Scenario

Used when a patient with vulvar symptoms undergoes evaluation for endometrial pathology.

Documentation Requirements

Document indication for biopsy and findings.

Specialty Considerations

Gynecologists should ensure that the reason for the procedure is clearly linked to the diagnosis.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of noninflammatory disorders, improving the ability to track and manage these conditions. N90.9 serves as a catch-all for unspecified disorders, which can lead to challenges in data analysis and treatment planning.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of noninflammatory disorders, improving the ability to track and manage these conditions. N90.9 serves as a catch-all for unspecified disorders, which can lead to challenges in data analysis and treatment planning.

Reimbursement & Billing Impact

reimbursement.

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

When should I use N90.9?

N90.9 should be used when a patient presents with a noninflammatory disorder of the vulva or perineum, and the specific nature of the disorder is not documented.