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ICD-10 Guide
ICD-10 CodesR87.620

R87.620

Atypical squamous cells of undetermined significance on cytologic smear of vagina (ASC-US)

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/11/2025

Code Description

ICD-10 R87.620 is a billable code used to indicate a diagnosis of atypical squamous cells of undetermined significance on cytologic smear of vagina (asc-us).

Key Diagnostic Point:

Atypical squamous cells of undetermined significance (ASC-US) on a cytologic smear of the vagina indicate the presence of abnormal squamous cells that do not clearly fit into the categories of benign or malignant. This finding is often a result of various factors, including hormonal changes, infections, or inflammation. ASC-US is a common result in cervical cytology screening and typically requires further evaluation to rule out significant pathology, such as cervical intraepithelial neoplasia (CIN). The clinical significance of ASC-US is that it may represent an early sign of potential cervical cancer, necessitating follow-up testing, such as HPV testing or a colposcopy. The management of ASC-US findings is guided by established protocols, which may vary based on patient age and history. Understanding the implications of ASC-US is crucial for timely intervention and patient education regarding follow-up care.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in clinical presentation and follow-up requirements
  • Need for correlation with HPV testing results
  • Potential for misinterpretation of cytology results
  • Documentation of patient history and follow-up plans

Audit Risk Factors

  • Inadequate documentation of follow-up plans
  • Failure to link ASC-US findings to appropriate diagnostic tests
  • Misclassification of ASC-US as a more severe diagnosis
  • Lack of patient history regarding previous abnormal results

Specialty Focus

Medical Specialties

Internal Medicine

Documentation Requirements

Documentation should include patient history, results of cytology, and any follow-up tests ordered.

Common Clinical Scenarios

Routine screening in women with abnormal Pap smears, follow-up of patients with previous ASC-US results.

Billing Considerations

Consideration of patient age and risk factors for cervical cancer in follow-up recommendations.

Emergency Medicine

Documentation Requirements

Acute care documentation should include the reason for the cytology test and any immediate interventions.

Common Clinical Scenarios

Patients presenting with abnormal vaginal bleeding or discharge requiring urgent evaluation.

Billing Considerations

Emergency settings may necessitate expedited follow-up for patients with ASC-US findings.

Coding Guidelines

Inclusion Criteria

Use R87.620 When
  • Follow the official ICD
  • CM coding guidelines, ensuring that the diagnosis is supported by clinical documentation and that any necessary follow
  • up procedures are also coded appropriately

Exclusion Criteria

Do NOT use R87.620 When
No specific exclusions found.

Related CPT Codes

88141CPT Code

Cytopathology, cervical or vaginal, scraping

Clinical Scenario

Used when performing a Pap smear that results in ASC-US.

Documentation Requirements

Documentation of the procedure performed and the results of the cytology.

Specialty Considerations

Ensure that the procedure is linked to the diagnosis of ASC-US.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of abnormal cytological findings, improving the accuracy of data collection and management of cervical health.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of abnormal cytological findings, improving the accuracy of data collection and management of cervical health.

Reimbursement & Billing Impact

The transition to ICD-10 has allowed for more specific coding of abnormal cytological findings, improving the accuracy of data collection and management of cervical health.

Resources

Clinical References

  • •
    American College of Obstetricians and Gynecologists (ACOG)

Coding & Billing References

  • •
    American College of Obstetricians and Gynecologists (ACOG)

Frequently Asked Questions

What does ASC-US mean?

ASC-US stands for atypical squamous cells of undetermined significance, indicating that the cells are abnormal but do not clearly indicate a high-grade lesion or malignancy.

What should be done after an ASC-US result?

Patients with an ASC-US result typically require follow-up testing, such as HPV testing or a colposcopy, to determine if further intervention is necessary.