ICD-10-CM L21 is the diagnosis code for Seborrheic dermatitis. This code falls under the section "Dermatitis and eczema" within Chapter 12 â Diseases of the skin and subcutaneous tissue (L00-L99). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions are not included in L21. If the patient has both, code each condition separately:
Understanding where L21 sits in the ICD-10-CM classification helps ensure proper coding:
No, L21 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
L21 is the ICD-10-CM diagnosis code for "Seborrheic dermatitis". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
L21 is located in Section L20-L30 â "Dermatitis and eczema" within Chapter 12 of the ICD-10-CM Tabular List.
L21 has 4 sub-code(s) that provide more specific detail: L21.0, L21.1, L21.8, L21.9.
Use L21 when the patients documented diagnosis matches "Seborrheic dermatitis" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Seborrheic dermatitis is L21.
No, L21 is non-billable. Use a more specific sub-code for primary diagnosis billing.
L21 is in Chapter 12 of the ICD-10-CM Tabular List.
Yes, L21 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.