L21.9

Billable

Seborrheic dermatitis, unspecified

L21.9 is the ICD-10-CM code for Seborrheic dermatitis, unspecified. It is a billable, specific code valid for reimbursement.

Status
Billable
Chapter
L00-L99
Parent
L21
Edition
FY2026

L00-L99 Diseases of the skin and subcutaneous tissue

What this means — in plain language

MedlinePlus · NIH

Your scalp is the skin on the top of your head. Unless you have hair loss , hair grows on your scalp. Different skin problems can affect your scalp. Dandruff is a flaking of the skin. The flakes are yellow or white. Dandruff may make your scalp feel itchy. It usually starts after puberty, and is more common in men. Dandruff is usually a symptom of seborrheic dermatitis, or seborrhea. It is a skin condition that can…

Read more about Dandruff, Cradle Cap, and Other Scalp Conditions at MedlinePlus ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

Includes

  • Seborrhea NOS

Frequently asked questions

What is ICD-10 code L21.9?
L21.9 is the ICD-10-CM code for "Seborrheic dermatitis, unspecified". It falls under L00-L99 Diseases of the skin and subcutaneous tissue.
Is L21.9 a billable code?
Yes — L21.9 is a billable, specific ICD-10-CM code valid for reimbursement.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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