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v1.0.0
ICD-10 Guide
DiagnosesAscus

Ascus

ICD-10 Coding for ASCUS(R87.610)

PRIMARY SPECIALTYOB/GYN
COMPLEXITYHigh
LAST UPDATED09/15/2025
Sam Tuffun, PT, DPT
Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Ascus?
Essential facts and insights about ASCUS

Key Clinical Considerations:

  • Presence of atypical squamous cells of undetermined significance (ASCUS) in a Pap smear
  • Patient has a history of abnormal Pap smear results

Clinical Information

Clinical Criteria & Documentation Requirements

  • Detailed description of the Pap smear findings
  • Record of patient's gynecological history
  • Documentation of any follow-up procedures or treatments

Coding Guidelines

Usage Guidelines & Examples

  • R87.610 is specifically for ASCUS, not for other abnormal Pap smear results
  • Different from R87.619, which is for other abnormal cytological findings

Code Exclusions

Important Exclusions

  • Atypical glandular cells (R87.612)
  • Atypical squamous cells cannot exclude high grade squamous intraepithelial lesion (ASC-H) (R87.611)

Related ICD-10 Codes

Primary Codes
R87.610
Atypical squamous cells of undetermined significance (ASCUS) on cytologic smear of cervix (ASC-US)
Ancillary Codes
Z12.4
Z86.001
Differential Codes
R87.611
R87.612

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

OB/GYN

Specialty Applications

  • Abnormal Pap smear results showing ASCUS
  • Follow-up visits for monitoring ASCUS

Coding Complexity

High Complexity

This diagnosis requires careful attention to:

  • Comprehensive clinical documentation
  • Accurate code selection based on clinical criteria
  • Proper exclusion considerations
  • Specialty-specific coding guidelines

Documentation

Documentation Templates

Template 1

Patient's Pap smear results show ASCUS.

Template 2

Patient is being monitored for ASCUS, as indicated by previous abnormal Pap smear.

Billing Information

Billing Considerations

  • Ensure proper documentation for billing
  • Verify code specificity requirements
  • Check for any additional codes needed
  • Review payer-specific guidelines

Common Issues

  • Insufficient clinical documentation
  • Incorrect code selection
  • Missing supporting diagnoses
  • Timing and frequency documentation

Frequently Asked Questions

What does ASCUS mean?

ASCUS stands for Atypical Squamous Cells of Undetermined Significance. It is a term used to describe abnormal Pap smear results.

When should this code be used?

This code should be used when a patient's Pap smear shows ASCUS.