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v1.0.0
ICD-10 Guide
DiagnosesAnal Skin Tag

Anal Skin Tag

ICD-10 Coding for Anal Skin Tag(K64.4, L91.8)

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

Diagnosis Overview

What is Anal Skin Tag?
Essential facts and insights about Anal Skin Tag

Key Clinical Considerations:

  • Presence of a soft, benign growth near the anal region, often asymptomatic but may cause discomfort or irritation.
  • No specific laboratory findings; diagnosis is primarily clinical.
  • Physical examination reveals a pedunculated or sessile skin tag, typically flesh-colored or slightly darker than surrounding skin.
  • Imaging is generally not required; however, anoscopy may be used to rule out other anal conditions.
  • Severity is typically not staged; however, the size and symptoms may guide treatment options.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Document the location, size, and characteristics of the anal skin tag.
  • Use specific terminology such as 'anal skin tag' or 'perianal skin tag' in the medical record.
  • Examples include: 'Patient presents with a 5mm anal skin tag causing mild irritation.'
  • Document medical necessity for any procedures performed, such as excision.
  • Include quality measures related to follow-up care and symptom management.

Coding Guidelines

Usage Guidelines & Examples

  • Use K64.4 for a diagnosed anal skin tag that is symptomatic or requires treatment.
  • Do not use this code for other anal conditions such as hemorrhoids or fissures.
  • K64.4 is distinct from K64.0 (hemorrhoids) and L91.8 (other hypertrophic scars), which may be confused.
  • Common errors include misclassifying anal skin tags as hemorrhoids; ensure clear documentation.
  • In complex cases, consider the patient's full clinical picture and any co-existing conditions.

Code Exclusions

Important Exclusions

  • Excludes conditions such as anal fissures (K60.0) and hemorrhoids (K64.0).
  • Use K60.0 for fissures and K64.0 for hemorrhoids instead of K64.4.
  • Conditions are excluded due to differing pathophysiology and treatment approaches.
  • Avoid confusion with anal warts (A63.0) which require different management.
  • Related conditions include perianal abscesses and fistulas, which are distinct.

Related ICD-10 Codes

Primary Codes
K64.4
Anal skin tag
L91.8
Other hypertrophic scars
Ancillary Codes
R21
Differential Codes
L91.8
K64.4

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

General Surgery

Specialty Applications

  • Patients with benign anal skin tags, typically adults.
  • More common in individuals with obesity, pregnancy, or chronic irritation.
  • Clinical settings include outpatient surgical clinics and general surgery practices.
  • Relevant for general surgery and dermatology specialties.
  • Used in treatment contexts involving excision or symptomatic management.

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

Template: 'Patient diagnosed with anal skin tag based on physical examination findings.'

Template 2

Template: 'Clinical presentation consistent with anal skin tag including irritation and discomfort.'

Template 3

Template: 'Diagnostic criteria met as evidenced by the presence of a soft, pedunculated growth.'

Template 4

Template: 'Treatment plan initiated for anal skin tag with excision scheduled.'

Template 5

Template: 'Follow-up care for anal skin tag including monitoring for recurrence or complications.'

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 documentation is required for this diagnosis?

Document the size, location, and symptoms associated with the anal skin tag.

How does this differ from similar diagnoses?

Anal skin tags are benign growths, while hemorrhoids are vascular structures that can become inflamed.

What are common billing considerations?

Ensure medical necessity is documented for any procedures related to the skin tag.

What procedures are typically associated?

Common CPT codes include 11200 for excision of skin tags.

Are there any quality reporting implications?

Quality measures may include follow-up care and patient satisfaction regarding symptom relief.