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    v1.0.28
    OpenPayerBilling CodesDermatitis and eczemaICD-10-CM l21-seborrheic-dermatitis
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    ICD-10-CM Code For Seborrheic Dermatitis: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group L21 includes seborrheic dermatitis and its anatomic and severity variants, covering conditions like seborrheic dermatitis of the scalp, face, and other specified sites. These ICD-10-CM diagnosis codes are used to document inflammatory, scaly dermatitis in seborrheic distribution, capturing lesion location, extent, and any specified recurrent or chronic features. Accurate coding within the ICD-10-CM L21 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM L21: Seborrheic Dermatitis Overview

    The diagnoses in this group represent inflammatory skin conditions characterized by greasy scales and erythema in sebaceous gland–rich areas such as the scalp, face, and trunk. They target the integumentary system and include variants like cradle cap and dandruff. Accurate coding matters for correct claim adjudication and reflecting disease severity for appropriate reimbursement.

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    When to Use

    Use a code from this group when documenting inflammatory, scaly dermatitis localized to seborrheic distribution such as the scalp, face, or trunk. Select the code that matches the documented anatomic site and any specified descriptors like recurrent or chronic status.

    ICD-10-CM Codes

    4 rows

    ICD-10-CM CodeDescription
    L21.0Seborrhea capitis
    L21.1Seborrheic infantile dermatitis
    L21.8Other seborrheic dermatitis
    L21.9Seborrheic dermatitis, unspecified

    DRG Codes

    2 rows

    DRG CodeDescription
    606Minor Skin Disorders with MCC
    607Minor Skin Disorders without MCC

    Typical Clinical Scenarios

    • An adult presents to primary care with chronic, scaly, mildly erythematous patches with greasy scales localized to the scalp and hairline, causing pruritus that has waxed and waned for months despite over-the-counter shampoos. The clinician documents a typical presentation of scalp seborrheic dermatitis without mention of other body areas or secondary infection, and assigns a code for seborrheic dermatitis of the scalp. Typical codes: L21.0
    • A middle-aged patient attends dermatology clinic for persistent seborrheic dermatitis involving both the face (nasolabial folds, eyebrows) and the trunk, with intermittent flares and treatment-resistant areas requiring topical antifungal and anti-inflammatory therapy. Because multiple non-scalp sites are affected and the visit addresses diffuse seborrheic dermatitis, a more general code for seborrheic dermatitis of other sites is used. Typical codes: L21.1, L21.8
    • An elderly patient in a long-term care facility is evaluated for an acute exacerbation of seborrheic dermatitis with extensive weeping, crusting, and possible secondary bacterial superinfection, necessitating urgent topical and systemic management and documentation of the complication. The provider assigns a code reflecting severe or complicated seborrheic dermatitis when recording the encounter and any comorbid infection. Typical codes: L21.8, L21.9

    Related Codes

    L20-ATOPIC-DERMATITIS

    ICD-10-CM Code For Atopic Dermatitis: Group Overview

    L22-DIAPER-DERMATITIS

    ICD-10-CM Code For Diaper Dermatitis: Group Overview

    L23-ALLERGIC-CONTACT-DERMATITIS

    ICD-10-CM Code For Allergic Contact Dermatitis: Group Overview

    L24-IRRITANT-CONTACT-DERMATITIS

    ICD-10-CM Code For Irritant Contact Dermatitis: Group Overview

    L25-UNSPECIFIED-CONTACT-DERMATITIS

    ICD-10-CM Code For Unspecified Contact Dermatitis: Group Overview

    L26-EXFOLIATIVE-DERMATITIS

    ICD-10-CM Code For Exfoliative Dermatitis: Group Overview

    L27-DERMATITIS-DUE-TO-SUBSTANCES-TAKEN-INTERNALLY

    ICD-10-CM Code For Dermatitis Due To Substances Taken Internally: Group Overview

    L28-LICHEN-SIMPLEX-CHRONICUS-AND-PRURIGO

    ICD-10-CM Code For Lichen Simplex Chronicus And Prurigo: Group Overview

    L29-PRURITUS

    ICD-10-CM Code For Pruritus: Group Overview

    L30-OTHER-AND-UNSPECIFIED-DERMATITIS

    ICD-10-CM Code For Other And Unspecified Dermatitis: Group Overview

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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