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v1.0.0
ICD-10 Guide
DiagnosesPsoriasis Vulgaris

Psoriasis Vulgaris

ICD-10 Coding for Psoriasis Vulgaris(L40.0)

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

Diagnosis Overview

What is Psoriasis Vulgaris?
Essential facts and insights about Psoriasis Vulgaris

Key Clinical Considerations:

  • Red, scaly plaques on the skin, often on elbows, knees, and scalp
  • Histopathological examination showing hyperkeratosis and acanthosis
  • Thickened, silvery-white scales on erythematous base

Clinical Information

Clinical Criteria & Documentation Requirements

  • Patient history including onset, duration, and severity of symptoms
  • Use of specific terms like 'plaque psoriasis' or 'chronic psoriasis'
  • Examples include detailed descriptions of lesions and affected areas

Coding Guidelines

Usage Guidelines & Examples

  • Follow guidelines for distinguishing between psoriasis types.
  • Common errors include misclassifying psoriasis as eczema.

Code Exclusions

Important Exclusions

  • Psoriatic arthritis (L40.5)
  • Other types of psoriasis (L40.1, L40.2)

Related ICD-10 Codes

Primary Codes
L40.0
Psoriasis vulgaris
Ancillary Codes
M07.xx
Differential Codes
L21.x

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Dermatology

Specialty Applications

  • Adults and children with chronic skin conditions
  • Dermatology clinics and outpatient 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?

Document the location, size, and characteristics of lesions.

Billing considerations?

Ensure accurate coding to reflect severity and treatment provided.