L400 - Common type of psoriasis causing scaly, red patches on the skin

International Classification of Diseases

Last updated: 10/3/2025

What is a ICD-10 Code?

ICD-10 (International Classification of Diseases, 10th Revision) codes are used to classify and code all diagnoses, symptoms, and procedures recorded in association with hospital care. These codes provide a standardized way to track health conditions and their treatment outcomes.

Detailed Description

Psoriasis vulgaris is the most common form of psoriasis, a chronic skin condition that causes your immune system to speed up skin cell production. This results in thick, red, scaly patches that can appear anywhere on your body but are most commonly found on the elbows, knees, scalp, and lower back. These patches may be itchy or painful and can vary in size. While psoriasis is not contagious, it is a lifelong condition that typically goes through cycles of flare-ups and periods of improvement. The condition can be managed effectively with proper treatment and lifestyle modifications.

Additional Information

This is a chronic condition requiring ongoing management. Treatment options include topical medications, light therapy, and systemic treatments depending on severity. Patients should be educated about triggers and proper skin care.

Category

Dermatological Conditions

Medical Specialty

Dermatology

Expected Costs

We expect this to normally be in the range of:

$150 - $400

This is an estimate based on typical billing patterns. Your actual cost may vary depending on your insurance coverage, provider location, and specific circumstances.

What's Required Before This

  • Physical examination
  • Medical history review
  • Possible skin biopsy if diagnosis unclear

What to Expect After

  • Regular dermatology visits
  • Monitoring treatment response
  • Skin care routine education
  • Lifestyle modification counseling

Why Understanding This Code Matters

On Your Medical Bill

This code appears on your medical bills to identify the specific service, procedure, drug, or medical diagnosis you received. Understanding what it means helps you verify you're being charged correctly and know what to expect.

For Your Health

Knowing what this code represents helps you understand your treatment plan, ask better questions during appointments, and track your healthcare journey more effectively.

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