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v1.0.0
ICD-10 Guide
DiagnosesPerirectal Mass

Perirectal Mass

ICD-10 Coding for Perirectal Mass(K61.0, K62.89, C20)

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

Diagnosis Overview

What is Perirectal Mass?
Essential facts and insights about Perirectal Mass

Key Clinical Considerations:

  • Pain or discomfort in the perirectal area
  • Visible or palpable mass during examination
  • Changes in bowel habits or rectal bleeding

Clinical Information

Clinical Criteria & Documentation Requirements

  • Patient history including onset and duration of symptoms
  • Detailed description of the mass (size, consistency, tenderness)
  • Results of imaging studies (e.g., ultrasound, MRI) if performed

Coding Guidelines

Usage Guidelines & Examples

  • Ensure correct code selection based on the specific characteristics of the mass.
  • Common errors include using nonspecific codes or failing to document symptoms adequately.

Code Exclusions

Important Exclusions

  • Hemorrhoids, anal fissures, and other benign conditions
  • Alternative codes for rectal tumors or malignancies

Related ICD-10 Codes

Primary Codes
R19.4
Change in bowel habit
K62.89
Other specified disorders of anus and rectum
Ancillary Codes
B96.20
Z51.11
Differential Codes
K61.3
K61.3
for abscesses located in the perianal region, not perirectal.
C20
C20
for biopsy-confirmed malignant masses.
K62.89
K62.89
for non-malignant masses.

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Surgery

Specialty Applications

  • Adult and pediatric patients presenting with perirectal symptoms
  • Surgical and outpatient clinical settings

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

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

Documentation requirements?

Include detailed patient history, physical exam findings, and imaging results.

Billing considerations?

Ensure accurate coding based on the specific diagnosis and associated procedures.